>>10134635The thing with DCC is that the easiest part for a small scale layout actually is the control system itself. On a basic level, you can just plug it in the same way you plug in a conventional power pack. That's how it works on my layout which uses the same E-Z Track in a modified oval layout for years.
The problem with DCC is going to be that in order to use it, you need locomotives equipped with the decoders and generally if the starter set does have a locomotive already equipped with one, it's most likely not even configured to be 'DCC Ready' which means it has a slot to drop-in a DCC decoder. And getting a non-DCC ready locomotive set up with a Decoder requires some electrical engineering knowledge that I wouldn't recommend for a beginner. Also, if you're going DCC, always get sound, it really does make a difference.
I would first suggest looking into your local NMRA group and getting in touch with their outreach program, as having ready access to a knowledgebase of people is invaluable when starting out.
However, short of that, here's what I would suggest:
Get the Bachman 'Echo Valley Express with Digital Sound' set because that comes with a DCC/Sound equipped steam engine (trust me, it doesn't matter that the engine isn't modern, it's a steam engine and your kid will love the noises of the steam hissing, the bell, and of course the whistle). Then pick up any old Union Pacific locomotive with DCC/Sound that fits your era and boom, you're off to the races.
In fact, if you go to ModelTrainStuff .com right now, you can get the Echo Valley Express set for almost half the retail price and a DCC/Sound equipped Bachman Union Pacific SD40-2 (one of the most ubiquitous locomotives ever produced and still seen in service on major railroads to this day, including the UP) #3450. All for around $500 before shipping, which for two DCC/sound loaded locomotives and a DCC system is a rather good deal.
