sue them
First, you have the burden of proof it was in the vehicle. This is nearly impossible unless you have photos of it in there as they took it. Judges are not sympathetic to those repossessed as there are so many who claim valuables lost while in impound or when repossessed. You will likely not be paid anything. Sorry, but the way the cookie crumbles.
You rights are to GET IT BACK, PP is not subject to the security interest on the car.
No
They do not have to notify you. You have no legal rights regarding car.
NO, the truck probably has been sold already and the lender got a repossessed title to sell it with. Of course they do make mistakes. LOL
Contact a local attorney for state/case specific advice. Please have all your paperwork and any proof of the "damages" when you do.
It did not includ the Bill of Rights.
The declaration of rights
I wish I knew
the bill of rights has everything to say that it has to protect our rights
The declaration of rights
Everything has to be classified, for this or that reason.