1 We use much and many in negative sentences and questions. We use MANY with countable nouns and MUCH with uncountable nouns.
2 The words a few and a little mean'a small quantity of something! We use a FEW with countable nouns and A LITTLE with uncountable nouns.
3 A FEW means 'not as many' and A LITTLE means 'not as much'.
4 We use BOTH to talk about two things.