A small single-motor loco like this doesn't need the power capacity of an XLS - it'll do fine with a smaller (and much cheaper!) LS. The generic "small diesel loco" (KoF) sound file should be fine for a Schoema, so you'd need decoder number 8221100.
If the loco code number is 2060, remember it'll be an old pre-digital gearbox so you'll have to do some extra work isolating the motor and adding one or two new wires - not difficult once you figure out what you're doing, there are several articles in the forum archives that will help.
Jon.