Problems with the keyboard!

So my macbook running leopard, the keyboard is acting odd. Some things I have found so far are caps lock is off, but when I type it's stuck on permanent caps lock, num lock doesn't light up, I can't type some letters for some off reason like "L" or "J" and backspace doesn't work. Along with the numbers, when I minimize a window it does it the slow way as is it's stuck on shift also. surprisingly plugging in a USB keyboard works. Also the trackpad seems sluggish in reacting. I haven't done anything to my mackbook, I just came home to it and found it this way. I have looked, but cannot find any solution, and I don't have Apple care, so taking it in would be my last resort. But really any suggestions would be appreciated.

Weird stuff does sometimes happen at random, but there's usually a good reason.

Couple of Questions:
Do the keys work after restart?
Has there been any physical damage?
Do you have any funky keyboard settings?
Have you updated the OS to the latest version?