Loan and security will always be active against the vehicle. It never goes away until paid or repossessed. Yes, the collateral may be repossessed at any time.
The owner of a vehicle that has been repossessed, cannot afford to make their payments, so it makes sense that they cannot afford to perform the required scheduled maintenance on the vehicle. This is not always the case but IMO, I would never buy a repossessed vehicle, unless it had extremely low mileage of say less than 20,000 miles.
Read the fine print of your contract carefully. I have never heard of a vehicle leasing/purchasing contract NOT having a first payment default clause.
Absolutely NOT! The vehicle legally belongs to the lien holder and any person who tries to recover said vehicle via self-help can be charged with Grand Theft Auto. NEVER, NEVER, NEVER attempt such an action.
If you cannot produce a "clean title", you cannot sell or trade the vehicle.
Who cares? Let the lender repo it, then sue 'em. File charges for stealing the car. Really, why would a lender even think they can repo a car that they have NO security interest in? especially if they never loaned any money on the car?
While you are entitled to your personal property that was in the vehicle, the simple fact is that if you can't prove the tools were there you'll probably never see them again.
Most likely not depending on what financial situation you're in.
If the terms of the lease include the requirement that you must provide insurance on the vehicle, and I've never seen a lease agreement that doesn't, yes, they can hold you in violation of the lease and repossess the vehicle.
When cars are financed, they're usually financed by a bank or some other type of lender. Once the car is repossessed, and the person it's repossessed from fails to recover the vehicle, the vehicle is sold at auction. Dealers attend these auctions, and bid on those cars. Once they've placed a winning bid and paid for the vehicle, it's theirs to sell. Now, if a dealer is the one who financed the car, they'll be the ones to repossess it. Once they've determined the person it was repossessed from isn't recovering the vehicle, they have every right to sell it. Hate to break it to you if this was your car, but it was never yours - so long as there's a lien on that vehicle, the lien holder is the rightful owner of the vehicle. Once they've given up on you reclaiming and making further payments on that vehicle, they can do whatever they want with it - because it belongs to them, and always had, from the moment they became the lienholder.
Return it to the dealer.
If you are not making the required payments to the finance company that holds the lean on you car it may be repossessed. Proof of income is not required or relevant.