Adding post information to single post view

[publicenergy]

One thing I've noticed is that when you click through to view a page with a single post on it, there isn't any information shown about the page - not even the date it was posted - like in this screenshot from another theme...



I particularly miss that edit button when going back and adding post thumbnails!

Now, I've found the code in my old theme that does this, but in this theme, all I can see in the singlepost.php file is a line to get sidebar - but that displays for everything - not just single posts.

So, my question really is, where would be the best place to insert code to display this information at the top of the sidebar without breaking other pages that aren't single posts.