Listen to the vocabulary using the Jukebox, use the arrow on the right to go down or up into the list. In French the first number "un" has a feminine form "une"

1. An (m) / Year
2. Un an / One year
3. Quel âge as-tu? / How old are you?
4. T'as quel âge? (most used) / How old are you?
5. Quel âge avez-vous? / How old are you? (formal)
6. J'ai 8 ans / I am 8 (in French we say I have 8 years)
7. J'ai 15 ans / I am 15
8. Combien de frères as-tu? / How many brothers do you have?
9. Combien de sœurs as-tu? / How many sisters do you have?
10. J'ai deux frères et une (f) soeur (f) / I have 2 brothers and 1 sister
11. Ton numéro de téléphone, s'il te plaît! / Your telephone number please!
We have two words for numbers: "nombres" when you calculate and "numéro (m)" to point a thing like your telephone or your house number.
So now, you know as to say "I have": "j'ai"