You will have to go through your local court system. As them what steps to take.
Mechanics lien
Generally, the lender keeps the title until the loan is paid. You cannot sell the vehicle without the title. The co-signer doesn't own the vehicle unless they are also named on the certificate of title.
If you mean that they are holding the vehicle because you have not paid them for services rendered yes they can. Repair shops can also do likewise. I had one guy as an executor of an estate come to pickup a repaired vehicle but refused to pay storage charges. I sold it and did quite well. He was foolish not to pay.
No, you can only replace a lost title. If the vehicle had a lien from the bank, a replacement title will still show the lien.
The loan must be paid before you can transfer title to the car.The loan must be paid before you can transfer title to the car.The loan must be paid before you can transfer title to the car.The loan must be paid before you can transfer title to the car.
I believe you can sell it if you are the beneficiary, or if you inherited the vehicle.
Legally, NO! You can sell the vehicle to anyone if the vehicle is over 10 years old and you sell it for parts only, but if the buyer wants to drive the vehicle, they will need a title.
You must have a title to sell a vehicle if the new owner plans to title the vehicle. If you are selling the car for "parts only", and not planning to put the car back on the road, then you can sell it with a bill of sale only. If they want to title the vehicle, you need to go to your local DMV and apply for a lost/stolen title. Once you get the duplicate title, then you can sell the vehicle.
Not without permission of the lender. A vehicle cannot be sold without a clear title of ownership. The lender is named on the title of a vehicle as the "lienholder" until the vehicle is paid for or otherwise released by the lienholder.
You can sell a vehicle to a salvage yard for parts with a bill of sale if they don't intend to resell the vehicle, but if you sell it to an individual, and they want to register the vehicle, they will need a title.
The buyer.
If the vehicle is paid off yes...If you are still making payments and you want to sell to an individual you will need to talk with your lienholder. If you are selling to a car dealer they will handle it for you.
The person listed on the title is the only person allowed to sell the vehicle.