well if you got no child-theme the place to insert this is just before ( around line 831):

require_once( 'functions-enfold.php');

in functions.php there is a comment for that place:

/*
 *  register custom functions that are not related to the framework but necessary for the theme to run
 */
put it in here

my advice is definitly to have a child-theme for enfold – all those nice snippets here from board are very easy to handle then – and are not lost on theme-update: https://kriesi.at/documentation/enfold/child-theme/

if you are working with a child-theme add this to your child-theme functions.php:
it will work without any other changings – because in footer.php there is allready a case 6: ;)

function my_avf_option_page_data_change_elements( array $avia_elements = array() ){
  /*** Example: Customize "Footer Columns Count" array*/
  $slug = "footer";
  $id   = 'footer_columns';
  $index = -1;
  /** Find index of element to change*/
  foreach( $avia_elements as $key => $element ){
    if( isset( $element['id'] ) &&  ( $element['id'] == $id ) && isset( $element['slug'] ) && ( $element['slug'] == $slug ) ){
      $index = $key;
      break;
    }
  }
  
  /** * If key not found, return unmodified array*/
  if( $index < 0 ){ return $avia_elements;}
  
  /*** Make your customizations*/ 
  $avia_elements[ $index ]['subtype'] = array(
            __('1', 'avia_framework') =>'1',
            __('2', 'avia_framework') =>'2',
            __('3', 'avia_framework') =>'3',
            __('4', 'avia_framework') =>'4',
            __('5', 'avia_framework') =>'5',
            __('6', 'avia_framework') =>'6'
          );
  return $avia_elements;
}
add_filter( 'avf_option_page_data_init', 'my_avf_option_page_data_change_elements', 10, 1 );

yes and did you try that ( above the post was for a specific postid )
You had to change it to your selector

have a look if this works – then we can go and make it more specific to your needs:

function remove_title_attr(){
?>
<script>
(function($) {
	$(window).on('load', function(){
		$('#wrap_all a').removeAttr('title');
		$('#wrap_all img').removeAttr('title');
	});
})(jQuery);
</script>
<?php
}
add_action('wp_footer', 'remove_title_attr');

the tooltip over links and images are not influenced by enfold – these are fundamental Settings of browsers to show a tooltip if a title tag is present.

You can remove the title attribute – but is it advisable to do so from an SEO point of view?
Put this to your child-theme functions.php:

function remove_title_attr(){
if(is_single(29041)) {
?>
<script>
(function($) {
	$(window).on('load', function(){
		$('#wrap_all a').removeAttr('title');
		$('#wrap_all img').removeAttr('title');
	});
})(jQuery);
</script>
<?php
}
}
add_action('wp_footer', 'remove_title_attr');

Yes – and you have done it the right way – and i can see it:
click to enlarge:

can you try to give to all images on a parent element one combined class.
F.e. group1
i tested it on a simple slider and textblocks in one color-section with custom class : group1
( you can give the custom-class to the alb-elements too – as long as the grouping class is on a parent element of the image with lightbox-added )
then put this to child-theme functions.php:

function popup_in_one_group() { 
?>
<script type="text/javascript">
(function($){
  $(window).on('load', function(){
	$('.group1').magnificPopup({
		delegate: 'a.lightbox-added',
		type:'image',
		gallery:{enabled:true},
	}); 
  });
})(jQuery);
</script>
<?php 
}
add_action('wp_footer', 'popup_in_one_group');

On some alb elements f.e. gallery you have no choice to define the lightbox effect selectively on each image. you only have the decision if or if not.

on the toggles.php there is no filter set : avf_customize_heading_settings like in some other alb elements.
There is for those alb elements a little snippets to change it in this way – but for toggles.php you can have a child-theme toggles.php and edit that line to have a heading tag instead.
on 4.8.1 it is line 974 and closing tag is on 975

$output .= '        <h3 data-fake-id="#' . $toggle_atts['custom_id'] . '" class="toggler ' . $titleClass . $inherit . '" ' . $markup_title . ' ' . $colors . ' ' . $hover_styling_markup . ' role="tab" tabindex="0" aria-controls="' . $toggle_atts['custom_id'] . '">' . $toggle_atts['title'] . '<span class="toggle_icon" ' . $icon_color . '>';
$output .= '        <span class="vert_icon"></span><span class="hor_icon"></span></span></h3>';

And for SEO purpose this will be the best way.
to have child-theme edited alb elements see docu: https://kriesi.at/documentation/enfold/intro-to-layout-builder/#add-elements-to-alb

A jQuery could change them all at once too – but on SEO this might be not the best solution.

Da wo du auch sonst das Menu bearbeitest.
Im Dashboard – Appearance – Menus
Du musst dann nur daran denken auch ein Menu zum Enfold Hauptmenu zu deklarieren:

on your ftp tree structure there is something like this:

Nächste Anmerkung:
Ein sehr schönes Plugin, welches eine automatische Siilbentrennung mit einem etwas anderem Algorithmus beinhaltet ist: Hyphenator ( Arnold Schwarzenegger läßt grüßen )
Ist aber performance intensiv und sollte nicht auf die Komplette Webseite genutzt werden. Obwohl es nun schon 5 Jahre nicht mehr aktualisiert wurde läuft es noch immer. Eventuell findet man auf dem dort genutzten Algorithmus mittlerweile akutellere Programme.

Ich begnüge mich mit der manuellen Setzung und dem Plugin von Günter. Es ist übrigens so ziemlich die einzige Chance Zeichen wie größer, kleiner, größer-gleich etc oder eckige Klammern einzusetzen. Denn diese werden sofort als tags interpretiert, was teilweise sogar die ganze Seite sprengt.
______________

Next comment:
A very nice plugin, which includes an automatic hyphenation with a slightly different algorithm is: Hyphenator ( Arnold Schwarzenegger sends his regards ).
But it is performance intensive and should not be used on the complete website. Although it has not been updated for 5 years now, it still runs. In the meantime, it may be possible to find more up-to-date programmes on the algorithm used there.

I am content with the manual setting and the plugin from Günter. By the way, it is about the only chance to use characters like greater than, less than, greater-than etc or square brackets. Because these are immediately interpreted as tags, which sometimes even blows up the whole page.

open a text-block and insert an icon –
or place the alb element Icon-box etc til you see this:

hover the icon you like to have – you will see the charcode of that icon – remember that code ( but erase the u in it)
PS: that backslash has on windows keyboard its own place and is often written to that Keyboard key. on mac OS it is a combination of ( Option – Shift – 7)

then in css you can use it as:

.custom-class {
content: "\e881" ;
font-family: "etoile";
}

but :

.avia-slideshow .avia-caption .avia-caption-title { color: white !important; }

That should work on easy slider – maybe it is a caching problem? Refresh the merged files etc.