The expressions a little and a few mean some.
a little money
a few friends
Countable / Uncountable Nouns
In connection with a little / a few people often speak of countable nouns and uncountable nouns.
Countable nouns have a singular and a plural form. In plural, these nouns can be used with a number (that's why they are called 'countable nouns'). Countable nouns take a few.
4 friends – a few friends
Uncountable nouns can only be used in singular. These nouns cannot be used with a number (that's why they are called 'uncountable nouns'). Uncountable nouns take a little.
3 money – a little money
Note: Of course you can count money – but then you would name the currency and say that you have got 3 euro (but not „3 money“).