How to activate revision info in line number view

This is called "Show Annotation" and you can find it in the "Team" menu. Since this is a pretty expensive operation, you can't make it the default.

Regarding the shortcut: You have to enable the command group SVN.

Window -> Customize Perspective... -> Command Groups Availability -> check "SVN".

If you do this, some SVN actions show up in the toolbar which you can remove again (if you want) using the same Customize Perspective dialog (tab Tool Bar Visibility).

Remapping the shortcut did not work for me but enabling the command group did (with the default key mapping Ctrl+Alt+A).

(did not find a way to reply to Aaron's answer so I had to create a new one)