The train does not run on a track, rather it has a driver and is driven throughout the mall.
The price of train ride is $5 per child, but they do offer a price break for multiple riders. Children who are under a year old are free. Tickets are needed for adults to ride with their children. Adults will likely want to ride along with the young children. There are also restrictions on ticket use if you purchase more than you need at that time. You can get your tickets from the Rail Road Crossing kiosk near JC Penney, Payless Shoes, and the children's play area.
Unlike the train ride that Volusia Mall offers at Christmas time, this one is there all the time. So plan your visit!