You have to fix the clock in the tower with the oil can in the trading store.
You can get a saddle by finding the calf for the girl rancher at Rock Ridge. Swap it for the oil can at the Trading Post in Dusty Gulch. Go to the clock tower and oil the center set of gears. When 3 PM finally comes, the train arrives.
only when your doing the train robbery
go to the bank
go to the train station
you shoot them so none of them reach the front of the train
Diamond Plains
I don't know, they're asking you.
The kid with the big head is in Dos Cactos in poptropica wild west island. He is near the sign that says: Train, Shooting Contest.
you leave before the bandits kill you
It will be after the train robbery.
They go in a train tunnel in the middle left
I think once you start riding the train it will tell you instructions and then you just do what it says.
its on the right of the train station in rocky ridge