One of the purposes of the disciples was to help tell Jesus's story and spread Christianity. All of them have gospels, just four popular ones are Luke, Matthew, John and Mark because of their prominence. They also helped Jesus travel or converted as they met him because of his teachings of love. Hope that was helpful.
No.
Jesus' disciples
All of them met Jesus.
No
They all faithly remained Jesus disciples after his death.
judas
Judas Iscariot, one of Jesus's disciples, is the one who betrayed him to the high priest for thirty pieces of silver.
He was not one of the 12 disciples.
No, Bartholomew was not one of the original twelve disciples of Jesus.
Yes, Matthew was one of the twelve disciples of Jesus.
Yes, Nathanael was one of the twelve disciples of Jesus.
Yes, Thomas was one of the twelve disciples of Jesus.