N.P.
When I was shopping around for my first car with my mother, she took me to a private seller who was selling a '69 convertible mustang. It looked slick and I really wanted it. My mother left her car as collateral along with all her contact info with the seller and we took the mustang for the weekend. We took it to our mechanic and he shot me down. He said it was a nice car, abet a bit pigeon wheeled, but classic cars require a lot of maintenance and I didn't even know how to change the oil.
So reluctantly we drove it all the way back, filled the tank up with gas and told the owner that it was a very lovely car but not good for a mechanically disinclined 17 year olds first vehicle, then drove home in our old brown Thunderbird.
I don't know if this is the normal or legal way to do it, but it's the way we did it. As for the loan, when we did finally find a car to buy, I bought from another private seller and got a car loan directly from wells fargo bank. My parents co-signed and they deposited $5000 directly into my checking account. I wrote the check to the person selling the car. The bank gave me a statement book with little tear out payment slips for every payment till the last, to mail in every month with a payment. Since I did not get a statement every month to remind me to pay, I had to remember to send the payment in by the fifth of each month on my own.