Buy cobuyer I wonder if you mean cosigner on a loan. If this is the case then the answer is no. As a cosigner you are simply agreeing to pay the loan if the person who took it out does not. It is in his or her name and you are responsible for it if they do not pay it.
You will be responsible for the loan payments
Well, it depends how the title was written. if it says buyer "or" cobuyer you dont need the other persons signature for anything .... if its written with "and" between your two names, u will have to have both people present to complete any removals or transfers. That or you can have the cobuyer sell u the car. They will still need to be present though.
That will be up to the LENDER.
Cobuyer, cosigner, they are the same thing. Wherever you sign as co-signer you should be aware that if the primary borrower defaults on payments you will be held equally responsible for paying the loan.
Yes, he or she would be equally responsible for the repayment of the loan balance.
Just for the auto.
Both the buyer and co-buyer are equally and completely responsible. All parties on a contract are 100% responsible to pay the note in full per the terms of the contract. Neither person is "more" responsible than the other. My suggestion is to help the bank find the auto and they may cut you some slack on the any remaining balance after the sale out of good faith but they have no obligation to do so.
Doesnt matter too much, you will be just as responsible if the primary buyer defaults.