I saw tortillas packs for sale for sure, they have a small shop. Thay also sell hot sauce and chips and de la rosa peanut candies. I am not sure of the sizes/weights of the packages.

They didn't ask me for a tip either and the attention was very good. Very friendly waiters and the cashier too

No, not so far

I'm not sure, but I could bet no. I do not remember seeing anything similar in the menu. You know, pozole, tacos, gorditas, tortilla soup, enchiladas, flutes.

possible