I still think that it’s either the friction of the GROUND material (Im not talking about the friction of your car, but the mesh that your car drives on), or maybe it has something to do with your dynamic actor settings, or maybe you did something wrong with the logic bricks. You see, since you are new, the variations of things that could be causing this are plenty, so its a little difficult to understand what the problem is.
I agree with toomai for your camera problem , did that work for you?
Either way, since we can’t recognize your problem, I would suggest you upload your .blend, so that we can see what the problem is first hand.
PS: What version are you using?