I am going to name everything I can think of so bear with me!
Chickens require 4 square feet each. You should include space for a feed station. If the coop holds 10 chickens, I'd put 9. Have a seperate coop, or whatever for quarentining birds. This is necessary for biosecurity. I strongly suggest a coop you can walk into. This is why we are building a new coop. If you want just a few chicks, then maybe something like the playhouse coop would be ideal, but if you're going for 10 or more I would definitely press for a walk in coop. If you look at the top of the page at the coop designs link, click that, there is TONS of information. Make sure it is predator proof. If you are getting standards, then you should be able to get away with 1x3 welded wire. It is strong and durable, although a pain to put up. You may also consider buying a dog kennel, and placing chicken wire or hardware mesh around the bottom to prevent them sticking out their heads. VENTILATION VENTILATION VENTILATION, NOT DRAFTS. It gets humid and moldy fast if you don't have ventilation. Runs need to have 10sq feet per chicken.