We use *much* with singular uncountable nouns.
Eg: I haven’t got much change. I’ve only got a ten euro note.
We use *a lot* of and *lots* of in informal styles. Lots of is more informal than a lot of. A lot of and lots of can both be used with plural countable nouns and with singular uncountable nouns for affirmatives, negatives, and questions:
Eg1: We’ve got lots of things to do.
Eg2: That’s a lot of money.
Of, cat timp am stat la lectia asta...