"lots of foods" means a lot of different kinds of foods, while "lots of food" just means a large quantity of food, could be all the same kind - a ton of apples is a lot of food

If you are focusing on the different types of things you buy, "lots of foods" is fine. It's short for "lots of types of foods" or "lots of different food items". "Candies" is a perfectly fine word when referring to types or pieces of candy.

A very common phrase: "We bought lots of groceries (food)." "We bought a huge cake, some candy, and fruit." Normally, English speakers do not say "we buy lots of food." Present perfect : We are "buying lots of food (at the moment) Past tense : We bought lots of food Future tense : We will buy lots of food Never say Candies. It is Candy (plural and singular). Never say foods. It is Food (plural and singular). Hope this helps.

I would say ' We buy lots of different foods. We bought a cake, some candy and some fruit. '