No. The repo man is not going to walk up to you and say "I'm here to take your car; could you sign these papers, please?"
You may be asked to sign papers afterward, if you're very lucky; papers agreeing to pay back the deficit between what you still owed on the car and what it was actually worth. If you're not lucky, the only thing you'll be asked to sign is a check for the full amount of the deficit, plus the repossession fees (probably $300-500).
That depends on the state law, but generally, no.
Once you sign the papers you are responsible
yes
Take your papers down to the dealership and discuss it. Unless they picked up the wrong car, it is likely you missed a payment or so.
It depends on the state, but usually it is only required that the lending institution have the papers. In general, you already know when the loan is in default.
Yes, you should get the car after you sign all the papers.
if i get my car repossessed, can they put a llien on the house?
Your car was probably repossessed by the lender who owns the car until you pay for it. Call your lender and they will be able to tell you how to locate your repossessed car.
On what grounds??? Forcing you to co-sign?? NOT
NO! Once you sign the papers, it is your car.
for ever
Yes, but you would have to sign the papers for the title of your car to be transferred to the new owner.