If I'm 18 can you finance a car?

You can easily apply for a student auto loan, even if you have no credit or poor credit. Usually auto finance companies won't require a cosigner for auto loans up to the $25,000 range. If you happen to be a student, there isn't a need to have a auto loan for a car that costs more than $25,000. There's only a few select car loan companies online that offer the flexability of being able to buy a car from anyone that you like.