How To Show Post Title Before Blog Title in Blogger

Click on Theme.
Edit HTML.
Search for
<title><data:blog.pageTitle/></title>

Replace with:-

<b:if cond='data:blog.pageType == "item"'>
  <title><data:blog.pageName/> |<data:blog.title/></title>
<b:else/>
  <title><data:blog.pageTitle/></title>
</b:if>