Your four core sentences
Your name
Ich heiße [name].
My name is [name].
Where you are from
Ich komme aus [country].
I come from [country].
Where you live
Ich wohne in [city].
I live in [city].
Your age
Ich bin [Zahl] Jahre alt.
I am [number] years old.
Questions people will ask you
Wie heißt du? — What is your name? (informal)
Wie heißen Sie? — formal version
Woher kommst du? — Where are you from? (informal)
Woher kommen Sie? — formal version
Wo wohnst du? — Where do you live? (informal)
Wo wohnen Sie? — formal version
Wie alt bist du? — How old are you? (informal)
Wie alt sind Sie? — formal version
Practice
How do you say "I come from Australia" in German?
Someone asks "Wie heißt du?" — what are they asking?
How do you ask "Where are you from?" in the informal form?