It's a learning experience! But if you spend time on BYC, you'll notice the 4 sq.ft. inside and 10 sq.ft. outside is what's recommended, and that's the minimum if all the birds get along. Add any wrinkles to that - like integration - and you will need more. A lot of this is dependent on your...
That coop and run are too small for 6 chickens, and it will make integration extra hard. When you want to integrate, you need to have extra space, for the chicks to get away from the big hens. Dimensions matter, too - 3.5 feet is not enough room for them to pass each other without getting into...