Hi everyone! A newbie here, I'm helping my neighbour with her model train set. I'll attach some photos, it's controlled by a Marklin Central Station 60212 and is about 17 years old. I'm a bit confused by the controller, need to read up some more, but it's in running mode and there is power to the track.

The issue I'm having at the moment is the trains will not continue to roll on the track. I'm only measuring 8v on the track, is this expected? What I can see is the contact points appear to be rusted, I tried to clean them with a wire brush and some cleaning wipes, helped the train travel slightly further, but it always stops after a short distance.

Is this a common issue, the rust seems to be quite uniform across the tracks, centre section? What is this type of track called?

The rolling stock is also Marklin. I've tried two trains, one rolls slightly, the other will not, there is sparking between the contact shoe and the contact point on the rail.

Is it correct that the rolling stock is addressed and that the controller detects which are on the track?

Appreciate any help or ideas anyone has, it is a beautiful set, be great to get it running again. I'm in Australia.