I'm new to model railroading. I haven't owned a train in more than 30 years, and I have never owned a Lionel O-gauge before now. I appreciate any help you can give a newbie.

I recently bought the Polar Express Ready-to-run Train Set (O Gauge) and I have it set up under my Christmas tree. I would like to add the track, but I'm not sure what I will need. I would like to setup a long section of track with a reverse loop at both ends. One reverse loop would go around a Christmas tree, the straight section would go down the hall, and the second reverse loop would go around the piano. The straight section of track between the two loops is about 65 feet.

I did some reading and found out that because of the three-rail system, I don't need any special wiring for the reverse loops. Can someone please confirm this for me?

My second question is about power. Will the little bitty transformer be enough to power that layout with only one train? If not, what do I need to buy so that I don't lose any of the functionality of the blue tooth controls?

I guess a follow up question is, what am I controlling. Does the Bluetooth controller control the transformer? In other words, does the transformer vary the amount of power supplied to the rials based on my input, or does the transformer supply constant power to the rails and the Bluetooth is controlling the speed of the train directly?