If you are talking about buying a car and then paying it off at your own pace, then it is very much possible. All you have to do is to visit a "Buy Here Pay Here" dealership, deposit some specified amount and drive away. Of course, you will have worked out how much you will be paying the dealer each month.
Sure, visit a "Buy here pay here" car lot. You have to have a deposit down. Haven't found anything where I live, cheaper than about $750 down. While doing this, you will have to have full coverage insurance, and it's more expensive to do compared to buying one flat out. Good luck.