Okay, well I spilled water on my MacBook Pro...

The Macbook can still turn on and off and loads just like usual. The only problem is that my keys do not respond or if they do, it is like a continuous press of a key which wont stop. The back lit lighting is still functional, yet not as illuminated like before. When it gets to the user start screen I cant type in my password to allow me to get to the main screen. I also can not access my files or anything like that which ***** because I am a student and I need to get files off of this computer before the semster ends. I am in serious trouble...

Is the only option buying a new one? If not, how much does it cost to repair? If I decide to do this on my own... how difficult is it?

Thanks for the help everyone.