We use much, many, a lot of, a few and a little to talk about quantity.
We use a lot of or lots of to mean a large quantity.
We use them in affirmative sentences (except in formal written English, where we can use, for example, a (large) number of).
We've got a lot of coffee in our town.
We normally use much and many in negative sentences and questions.
E.g: She hasn't got much money.
Do you watch many films?
How much milk do you drink?