I can't help with 1, but..
2. if it is a stock door panel, it should be fairly easy to remove. There is a bolt holding the door handle on, two phillips screws holding the arm rest on and I believe that is it. From there it is held on with clips. You will want a to use a plastic scraper or a door panel removal tool if you want a chance at saving the panel, from the clips ripping out. Something like
this.
3. You can take out the back seat and climb into the trunk and turn the lock from the inside or remove the two bolts holding the latch to the trunk. From there you can purchase a new lock and key.
