Yes you can get it serviced anyplace just keep all your receipts to prove the work was done should the need arrive that the dealer would need to see them in case of warranty work.
No, because it isn't your car.
When the lease expires
Yes
yes
That's what insurance is for.
Yes
Yes
Yes, you can use a leased car as collateral for a loan, but it depends on the lender's policies and the terms of the lease agreement.
For the purposes of insurance, Yes.
yes
All you do is call a dealer that sell that make. If not leased by the manufactuer call the leasing company for instructions
You can trade the cars all in for what you want. Trade for what is on the market