MacBook Pro :: Post-spill, Certain Keys Not Working And/or Typing Non-stop?

I spilled a bit of milk on my computer this morning and managed to move fast enough to drain most of it. I turned the computer off, and on again, just to make sure that it was running. (I know now I shouldn't have...) I was able to log in, etc. My trackpad was going a bit wonkers, but it's done that before, so I wasn't worried. Turned it off, flipped it over, set it aside. 

A number of hours later, I turned it on again, and now the keys from A-L (ASDFGHJKL) and T-O (TYUIO) aren't working. I require a password, so now I can't log in. I noticed also that some key types non-stop (in the password box) until I press delete, which stops the typing. I've taken off a number of keys and cleaned them, but even if I press the squishy thing underneath, the keys aforementioned don't type. 

Can someone tell me what I can do, if anything, manually before I get an external keyboard? (I won't be going into Apple -- not interested in spending a few hundred+ for cleaning/fixing; my warranty's run itself out.) 

And, as a side question: I'm not sure if my Bluetooth is on. What do I have to do to be able to connect a wireless keyboard? Or do I need to get one with a USB? Or, because I'm logged out, am I completely screwed?

Info:
MacBook
Pro