Much or many?

1) There is too water in the bath.
2) How brothers and sisters do you have?
3) I don't receive letters nowadays.
4) How rice do you eat per week?
5) I put too salt in the soup.
6) How people were in you house last night ?
7) I don't have time.
8) She didn't ask questions.
9) My grandfather does not have hair, anymore.
10) How plates do we need?