Yes, they are. An auto loan is secured loan based on the collateral of your vehicle. If you don't pay the loan they will unfortunately come take your car away.
No auto loans are not usually considered guarantor loans but you can request one when you get the loan and it is possible to get one. Most of the time they are just regular loans.
Any loan means you've asked for money-on-credit from a lender. An auto loan money-on-credit from a lender, usually a bank, credit bureau, or dealership, given specifically to buy a car, and typically...