Getting the following Validity Errors… How do you fix this????

Warning Line 137, Column 72: Document uses the Unicode Private Use Area(s), which should not be used in publicly exchanged documents. (Charmod C073)
…=”#” aria-hidden=’true’ data-av_icon=’’ data-av_iconfont=’entypo-fontello’></…
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Error Line 214, Column 578: The scrolling attribute on the iframe element is obsolete. Use CSS instead.
…height:21px;” allowTransparency=”true”></iframe></div><li class=”share-st…
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Error Line 214, Column 578: The frameborder attribute on the iframe element is obsolete. Use CSS instead.
…height:21px;” allowTransparency=”true”></iframe></div><li class=”share-st…
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Error Line 214, Column 578: The allowtransparency attribute on the iframe element is obsolete. Use CSS instead.
…height:21px;” allowTransparency=”true”></iframe></div><li class=”share-st…
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Error Line 214, Column 892: The scrolling attribute on the iframe element is obsolete. Use CSS instead.
…eight: 18px;” allowTransparency=”true”></iframe></div><li class=”share-re…
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Error Line 214, Column 892: The frameborder attribute on the iframe element is obsolete. Use CSS instead.
…eight: 18px;” allowTransparency=”true”></iframe></div><li class=”share-re…
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Error Line 214, Column 892: The allowtransparency attribute on the iframe element is obsolete. Use CSS instead.
…eight: 18px;” allowTransparency=”true”></iframe></div><li class=”share-re…
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Error Line 214, Column 1152: The scrolling attribute on the iframe element is obsolete. Use CSS instead.
…h=”120″ scrolling=”no” frameborder=”0″></iframe></div><li class=”share-li…
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Error Line 214, Column 1152: The frameborder attribute on the iframe element is obsolete. Use CSS instead.
…h=”120″ scrolling=”no” frameborder=”0″></iframe></div><li class=”share-li…
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Error Line 214, Column 1691: The allowtransparency attribute on the iframe element is obsolete. Use CSS instead.
…tox” style=”width:101px; height:20px;”></iframe></div><li class=”share-tu…
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Error Line 214, Column 1691: The frameborder attribute on the iframe element is obsolete. Use CSS instead.
…tox” style=”width:101px; height:20px;”></iframe></div><li class=”share-tu…
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Error Line 214, Column 1691: The scrolling attribute on the iframe element is obsolete. Use CSS instead.
…tox” style=”width:101px; height:20px;”></iframe></div><li class=”share-tu…
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Error Line 214, Column 1832: & did not start a character reference. (& probably should have been escaped as &.)
…/?url=http%3A%2F%2Fwww.bodybgood.ca%2F&name=homepage” title=”Share on Tumblr” …
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Error Line 214, Column 2380: An img element must have an alt attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
…idgets/pinit_fg_en_rect_gray_20.png” /></div><li class=”share-pocket”…

I am wondering how I can fix these… There seem to be quite a few of these and I don’t think it is too good. So is this something you folks should be looking at…

Thanks.