4
No. Eleven of the twelve "Apostles" were from Galilee. Judas was apparently from Judea. 'Disciples', however, came (and COME) from every nation.(Acts 1:8) For starters, on Pentecost, after Jesus...
Because He was healing people. That is what He said, they followed Him because of His miracles.
He died at age 33
The authorized Bible doesn't say.
Jesus lived in the Roman period or era.