Question: Which is the right-click equivalent to `svn status` in [TortoiseSVN](http://tortoisesvn.tigris.org/)? TortoiseSVN is a Windows' GUI for Subversion.

Answer: 
You can see all local changes in "TortoiseSVN > Check for modifications". The "Check repository" button will also look for remote updates.

But you can do the same by opening the commit window - it's the same as long as you don't click on the commit button accidentally.
"Check for Updates"