Hi, and welcome to BYC. Congrats on your new home purchase. Regarding the coop though, I am assuming from "bought" that it's one that is already made? Be warned that the amount of chickens these factory coops say they can hold is usually greatly exaggerated. The cardinal rule is at least 4 Ft.2 per chicken for their happiness and health.
As for getting your chickens, if you are going to start from chicks I have found that ordering direct from the breeder or hatchery ("online") is much better that getting chicks from a feed store and for two reasons. One; chicks from a feed store usually get handled a lot by previous customers, and this exposes them to a lot of hand-borne diseases. Also (two) this handling is not monitored by the store staff and so chicks from one bin invariably will end up in a completely different one, and so gender and breeds will get all mixed up leaving you to wonder whether you even got the type/sex of chicken you wanted..
I purchased some sexed Easter Egger pullets (female) from a feed store last April, and even though I got there a mere 3 hours after they had arrived, one of the pullets turned out to be a rooster. Granted this is entirely possible as sexing isn't 100% accurate, but another turned out to be a Black Australorp, a completely different breed! So now I'm not even sure the rooster is an Easter Egger.