1. If you can afford to cover the run, it's certainly good protection from the weather and from predators.
2. Unless the coop is facing into predominant winds or you get prolonged freezes, I wouldn't worry about too much ventilation there.
3. Up to you. Personally I'd feel safer with a door, just as an extra level of protection. But if you feel confident in the security of the run no reason that you must have a door.
4. 8-10 birds could use 3 nest boxes. Measure your boxes and see what you're working with. 12"x12" is pretty standard for standard hens, though I personally like having them a bit larger.
5. I'm not keen on chemicals or powerwashing. Getting wood wet is something to be avoided, if you can help it. Since it's been sitting for a long time, I'd just give it a good sweep out, maybe a new coat of paint, and call it a day as far as cleaning.
2. Unless the coop is facing into predominant winds or you get prolonged freezes, I wouldn't worry about too much ventilation there.
3. Up to you. Personally I'd feel safer with a door, just as an extra level of protection. But if you feel confident in the security of the run no reason that you must have a door.
4. 8-10 birds could use 3 nest boxes. Measure your boxes and see what you're working with. 12"x12" is pretty standard for standard hens, though I personally like having them a bit larger.
5. I'm not keen on chemicals or powerwashing. Getting wood wet is something to be avoided, if you can help it. Since it's been sitting for a long time, I'd just give it a good sweep out, maybe a new coat of paint, and call it a day as far as cleaning.