This is the 36th most frequent Italian word.
tutto
"Everything" or "all."
Tutto is used as an adjective modifying 'quello'. It refers to all that is needed.
Ho comprato tutto quello che mi serviva.
I bought everything I needed.
Tutto acts as a pronoun meaning 'everything,' encompassing all situations or elements.
Tutto è andato come previsto.
Everything went as planned.
Tutto is used as an adjective modifying 'il film', meaning the entirety of it.