Can I have a few / a little onions , please . a few a little

The correct sentence is: Can I have a few onions, please?

Few is used with countable nouns

Little is used with uncontable nouns(when you're talking about the quantity)

1. at, in

2. from, to, on

3. to, about

4. from, under

5.by, on, to 

меня зовут лера. я хожу в школу, мне десять лет! я люблю кататься на коньках, а я занимаюсь танцами. я отличник! я живу в городе москва!