Fastrack remote control track And operating car

It will run off track power.  Just insert the operating track.

A plunger type operating car will work with any type of track that has an electromagnet inline with the center rail.  If the set came with FasTrack, either the 6-12054 FasTrack Operating Track (10") or the 6-12020 FasTrack Uncoupling Track (5") will activate this type of car.

Although these 2 types of track pieces will work with the 18VDC wall transformer that comes with the set, using those is not recommended for two reasons.  Often these electromagnets draw enough power to slow or stop the trains and most importantly because these magnets can overheat very quickly on 18VDC leading to a literal meltdown of the track and or magnet windings.  Note: that before using these, make sure that the switch doesn't get stuck in the on (down) position (this has been widely reported as a problem).  If you're electrically inclined, adding a small PTC (resettable fuse) inline is a reasonable precaution.

A good source of power for these would be a small AC transformer set to around 12V and connected to the Aux Inputs of the Operating/Uncoupler track.

you are correct.  It will operate the plunger on track power as i park the plunger over the magnet.  my mistake.  thanks for your help.