Although the source is not given specifically, It was Joseph of Arimathia who begged the body of Christ for burial, using his own personal crypt for the purpose so likely it was He that supplied the necessary material. After the resurrection, his body was glorified, and he did appear with clothes to his disciples. In fact, on the road to Emmaus two of the disciples were joined by the risen Jesus, but hey did not recognize Him until their eyes were opened. (Luke 24:31) The Lord then vanished. The Bible does not specify where the clothes came from. Presumably, they were glorified clothes as they were able to appear and vanish with Him, as also occurred with angels throughout the Old and New Testaments.
his disciples, before Jesus ascended into heaven
The disciples were meeting together in a room on one of the occasions when Jesus appeared to them after the Resurrection.
The sea of Galilee
fish baked on charcoal.
The synoptic gospels (Matthew, Mark and Luke) are clear in saying that the risen Jesus did not appear to the disciples near the Sea of Galilee, but John' Gospel disputes this, saying that he appeared to the apostles beside the Sea of Galilee.
Jerusalem. This is where Jesus was crucified, and this is where his disciples first preached his resurrection.
According to Luke 24, the disciples' "eyes were opened and they knew Him" after He broke bread (verses 31 and 35).
Jesus told his disciples to go and spread his name and his word. After saying that he gave the disciples the language of tongues.then Jesus ascended towards heaven.
There are a few books after the gospels that talk about what the disciples did after Jesus' death, but I would suggest Acts, in the New Testament.
No one knows, because there is a strong chance that Jesus was never resurrected at all.
Jesus did not ever appear to Peter privately after His resurrection.
It was important because he was the son of god.