MAC Lion startup problem.

Lion - startup disk full showing gray screen...

Hey my MACs startup disk is toally full, and I can boot it up... After login screen,it only shows a gray screen, when Cmd+tab I get 'No window', and menu bars and anything is not showen.

I tried to rebbot into the console to.delete some files, but because my users data is encrypted can't I delete some files.

Just before I was getting to problem, it said No space left and I deleted alot of unused files. But the free space dis grow, so I rebooted and the.problem started... Help please