Macbook keyboard problems

Hi guys,

My keyboard is all whacked out. I can't type the number "eight" and when I press the left arrow it turns on my capslock. I've tried resetting the keyboard back to default but that doesn't work.

I am not really sure what the solution is, has anybody else had this problem?

 

Model Identifier: MacBook4,1 and the OS is 10.5.Eight

I could use an external to solve the problem but it won't always be convenient. The Macbook is over 2 years old so I dont think its under warranty.

 

I do not see a language and text setting. All my stuff should be North America/United States and set in English