To make the american chili and beyond you need ingredients like onion and carrot, how do you get these? they arent available at the normal shop.

You can buy those in Rich People's Area Groceries Shop. That area will unlock after you had exactly 1M cash on you. When you visit the shop, it will cost you 1M for a Lifetime Membership. So, make sure you had more than 1.5M before you go there becuase everything is really expensive.