Muito can also mean too much:
But obviously with a word that has so many nuances, "too much" should not be the only answer.
It is uncommon to use "much" or "many" in affirmative sentences, although it is not ungrammatical. It feels rather stilted. The preference is to use "a lot".
Ngrams- Corpus of English:
"Much" and "many" are associated with negative sentences and questions.
• Do you have much money?
• I don't spend much money.
• Does Bill have many friends?
• He doesn't have many friends.