Trains have normally self- service restaurant and telephone. Many trains have video coach too. There is no express train supplement. On most long distance trains, seat reservation is possibly, but not neccessary unless you are traveling on Friday or Sunday afternoon. On InterCity and Pendolino S220 trains seat reservation is obligatory.
Coaches have red livery.
On night trains, sleeping-cars are available with one, two or three beds per compartment. In Finland there is no couchettes, because sleeping-cars are very reasonably priced. Supplement is in three bed compartment normally only 60 FIM pro person. If you want one bed compartment you have to buy 1st class ticket. In Kuopio you can use your compartment from 10pm although your train is departing much later and at the end station until 8am.