I have been into HO trains for over 50 years and the other day I bought my 1st DCC equipped engine (Bachmann Spectrum Decapod) and now I have questions. I assume it will run if I just hook up a transformer but if I wanted to use some of the DCC functions  I know I'm going to need more things. If I were to get a Bachmann complete DCC controller would that be all I would need to use some of the functions of a DCC set up or would I need to get additional items? All I'm looking for is something simple that makes my Christmas layout a little more interesting.  I know nothing at all about DCC. Too bad they didn't print a book "DCC FOR DUMMIES".