Hmm, I was deleting some files last night and when I came to booting up this morning my Macbookpro (5 years old) i was greeted with a user login screen? put in my password, but all i get is the space screen and no further action...? cant get apps o my bar

Sounds like you may have deleted something you shouldn't have. Boot to an OS X DVD or a bootable backup, and using Disk Utility, do a repair disk, and while there repair permissions. Disconnect any peripherals, and reboot. If you get the same startup behavior, do a safe boot, by holding the shift key down when booting. If that works, try a normal boot. If neither step helps, you may need to relaod your operating system.