Does this store take an unlimited amount of coupons, say one coupon for every item. Purchased? And does this store take out of date coupons like the stores in California do?

Yes, they take individual coupons and honor out of date ones too.

Yes

They also take combinations if the purchase amount is large enough. For example, one coupon for every item purchased along with a coupon for 10 dolllars off for every 30 dollars purchased if you have one

Yes. They accept out of date coupons and one coupon per item purchased. Enjoy!