Jesus prayed in the garden of Gethsemene.
Jesus was crucified on Golgotha, not Mount of Olives.
The last supper came after Jesus knew He was going to be crucified. Jesus, being God, always knew what form His death would take.
Good Friday is the day on which we remember Jesus being crucified. In the Gospels, Jesus was crucified on the day before the Sabbath (which was Saturday) to rise on the third day afterwards (on the Sunday). Therefore as Jesus was crucified on a Friday, the day on which we remember the crucifixion, is always a Friday.
We know of at least 2
Being crucified again
john
Historical accounts vary on whether Jesus was crucified naked. Some sources suggest he may have been partially clothed, while others indicate he was stripped before being crucified. The exact details are not definitively known.
Two other robbers where on each side of Jesus when he was being crucified.
There was a thief on each side of Jesus. These two were also being crucified for stealing, but Jesus hadn't done anything to deserve crucifixion.
Jesus resurected three days after being crucified and put in the tomb
The individuals on the crosses with Jesus were two criminals who were being crucified alongside him.
2 robbers w/o names
No, Jesus had to get crucified to save us from sin. It was a better choice than letting us not exist and have sin. From now till forever we should respect Jesus!