dougfromojai

Hello I am a newbie and was given a new Piko Gscale train plus track (not a set) and I need a controller (I think that is what its called) to make it "go". Several years ago I bought a Bachmann set but it was pretty junky so I have essentially traded up. What are some recommendations for picking a good controller for this train? I would love to have it remote control, but at this point I really do not know what the considerations are at this point. Do controllers have to be brand specific? I assume they have to be scale-specific... What else? Any help is appreciated... Thanks!