There should be a Train NPC driver, to drive trains around New York.
/train - Basically a command like /help, showing you all available commands for you. There will be more commands on the list, available for Admins
/buyticket [type] - If you are near a ticket machine, you can use this command to buy a ticket. Either for the Cityline (1) or the Travelline (2).
/exittrain - If the train has come to a stop at a station (Conductor will announce), you have to use this command to get off a train. But remember, your ticket now has expired and you have to buy a new one before you can enter the train again.
Cityline Ticket :
Default price : $350
You can use the Cityline ONLY
Travelline Ticket :
Default price : $700
You can use the Travelline ONLY
The ticket will expire once you enter the train. So if you exit the train, you will have to buy a new ticket before you can enter the train again.