How old was Jesus when he stayed behind at the temple?

He was 12 years old.

Source: Luke 2:42-48

What tribe was Anna from?

She was from the tribe of Aser or Asher.

Source: Luke 2:36

Who else greeted the baby Jesus in the temple and prophesied about him?

Anna an older widow and prophetess..

Source: Luke 2:36

Promised by the Holy Spirit that I would not die until I saw the Christ I prophesied when Mary and Joseph presented Jesus in the temple Who am I?

I am Simeon the prophet . My speech is called the Nunc dimittis in some liturgies.

Source: Luke 2:21-35

When Mary and Joseph sacrificed two turtle doves for Jesus what did that mean?

That they were middle class or poor. A rich family would use 1 lamb and 1 turtledove

Source: Leviticus 12:6-8