Your lack of punctuation and stream-of-consciousness posting makes it difficult to follow your story. It is not clear why you would by one car, then agree to trade it for another. If that second car was in fact stolen, and was in fact seized by the police as a result, you can sue the person who 'sold' you the car for the money / value you paid to receive the car from them. If you are stating that you were arrested based upon an accusation by the actual owner that you carjacked him, and are now facing criminal charges as a result, there's not much more to say than you need to work with a criminal defense lawyer.

You should be able to recover your personal effects from the vehicle; if you chose not to do that and it is now too late, then get a replacement check from the IRS and I hope your tools weren't of significant value.