Hi, i'm new to all this train modeling hobby. I recently bought a Large scale Christmas set that came with the christmas street car. When i watched the DVD i saw that the trolley went from one side to the other automatically... how can i do that?? what do i need to buy??

Also, (this may sound like a stupid question but...), i have the 46605A speed controller and i see there are two buttons on top, what are this for??