Poco (“a little/few/some”), molto (“a lot/ many/ very), and troppo (“too much/ excessively”) are adjectives which give approximate quantities or qualities to the nouns (and sometimes verbs) they accompany. Following are some examples:
Ho comprato molti regali.
I bought a lot of gifts.
Conosce poche ragazze.
He (only) knows a few girls
Hanno mangiato troppa cioccolata.
They ate too much chocolate.
Their forms (as adjectives) are regular as they will agree in gender and number with the noun they modify.
*Notice that poco must insert an –h in its plural forms, e.g.,
Hanno avuto poche pere.
They only had a few pears.
Ho visto pochi appartamenti.
I (only) saw a few apartments.
Please see Section 10.7 for a note on how pochi, molti, troppi can be used as indefinite pronouns.