"Tienes" is translated to "you have" and "digo" is translated to "I say" in English.
¿Qué es tu edad? More commonly, ¿Cuantos años tienes?
¿Cuantos años tienes? ¿Cuantos años tienes tu?, which literally translates to "How many years do you have?" (How many years do you have) ¿Cuantos años tiene? ¿Cuantos años tienes?
Tomas, When you have
It means "Do you have a cellphone?"
I have is (yo) tengo You have is (tu) tienes
"You have the stapler."
"You have my body."
Usually this would be "¿Cuántos años tienes?" or "How many years have you?", You could say "¿De qué edad eres?", but this would be less common.
"Anos tienes" translates to "How old are you?" in English.
You would say "Are you afraid, little girl?"
Literally, it means "You have luck," but it is use to say "You are lucky."