1) There aren't many eggs left. I'll go buy some.
2) You put too much sugar in my coffee. It's very sweet.
3) We haven't got many apples left.
4) I think you cooked too much potatoes.
5) I don't drink much milk, but I should.
6) How much pepper is left?
7) There aren't much carrots in the fridge.
Much употребляется с неисчисляемыми предметами, а many - с исчисляемыми.