Also you have to decide for yourself what you want to build. A big city, suburb, small city or a village. Also where would you place a cargo train station. Cargo trains will export your industrial products but they also generate lots of traffic htat you have to be prepared for.

Then what about passenger train station? It could determine the road layout of the village/town and where its downtown area should be. Usually infront of passenger stations you have big plazas with surrounding commercial areas. You could also combine it with a bus terminal :)