1.) How do I remove the broken part of the key out of door? 2.) How do I get a replacement key?

I have a 1996 Toyota Avalon. I have 1 key for the car. I went to unlock the drivers side door and the key broke in half inside the door lock. My questionS are: 1.) How do I remove the broken part of the key out of door? 2.) How do I get a replacement key?