It seems that you are not ready to buy a car. If you are new driver, I think you'd better to buy
your car spring, not before winter, wait and learn.
If you buy from a dealer, dealer may handle every thing but insurance for you, you need to pay 15% tax.
If you buy private car, both of you go to driver license office, the owner must buy and give you the information package. You must read it carefully to ensure no lean on the car, no accident, no rebuild. Then you pay 7% or 8% tax to the office, not the owner.
Car safety is very important. And there are many tricks when you buy car. Some private cars (Japenese)
are not real private sale. There are a lot of people fed by this kind of business. And most real
private Japenese cars sold very quickly because of these people's work.