The "Village"

1. To use the airlock, simply open the inner door, open the airlock, close the inner door, then open the outer door.
2. Of course, if you're not wearing a space suit when you open the outer door, you'll die from the vacuum.
3. See the question about the roulette wheel.
4. There's a space suit in the locker in the Flophouse.
5. You can now open the outer door of the airlock without rupturing your lungs.