In the page settings, select a position to add the 'HTML/JavaScript' widget. Paste the following JavaScript code into it and change the [LikerID] to your Liker ID, then save it. The LikeCoin button will appear automatically.
Go to 'Theme' and click 'Edit HTML'. Search for data:post.body, and when you see </div>, insert the following source code, replacing [LikerID] with your Liker ID:
<!-- Then use the post body as the schema.org description, for good G+/FB snippeting. -->
<div class='post-body entry-content' expr:id='"post-body-" + data:post.id' expr:itemprop='(data:blog.metaDescription ? "" : "description ") + "articleBody"'>
<data:post.body/>
<div style='clear: both;'/> <!-- clear for photos floats -->
</div>
Add the source code after the closing </div> tag, so it becomes:
<!-- Then use the post body as the schema.org description, for good G+/FB snippeting. -->
<div class='post-body entry-content' expr:id='"post-body-" + data:post.id' expr:itemprop='(data:blog.metaDescription ? "" : "description ") + "articleBody"'>
<data:post.body/>
<div style='clear: both;'/> <!-- clear for photos floats -->
</div>
<b:if cond='data:blog.pageType == "item"'>
<script type="text/javascript">
document.write("<iframe scrolling='no' frameborder='0' sandbox='allow-scripts allow-same-origin allow-popups allow-popups-to-escape-sandbox allow-storage-access-by-user-activation' style='height: 212px; width: 100%;' src='https://button.like.co/in/embed/[LikerID]/button?referrer="+encodeURIComponent(location.href.split("?")[0].split("#")[0])+"'></iframe>");
</script>
</b:if>
If there are two instances of data:post.body in the 'Edit HTML' section, you have to edit both because one is for desktop and the other is for mobile. Please note that you have to change to "Custom" for the mobile version in order for the LikeCoin button to display.
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If your other blog services support a change of theme, you may try to add a LikeCoin button by this method.