Foodland did not have prepared pizzas that I saw. They do have a deli/prepared food area-salads, hot dishes, rotisserie chicken and grab and go salads and sandwiches. And all the usual groceries. I presume you will be in a studio with the microwave and a small refrigerator. Check with Guest Services and they will get you more paper plates, plastic ware etc. for your room. With 6 kids getting cereal at Foodland would be a cost saving.
To get to Foodland you take HI-93 East which becomes H1 East toward Honolulu. Get off at Exit 1B keep right at the fork toward Makakilo/Kapolei/Kalaeloa. You will be on Wakea St.Stay straight past the first traffic light, then about 4 blocks. There will be a small shopping center on the right Foodland is there. The stores all face in toward the parking area so there isn't a big sign on the street. The actual address is on Kapolei Pkwy but this way is easier. There are Costco, Target, Safeway and Longs Drugs in Kapolei as well.