THe transformer on that put out half an amp. Most DCC chips will handle put to 1A at least and that's because the loco may pull that much amperage under certain conditions.
I'm completely with Phil, go DCC from the start. Many more options on anything you'll buy, smoother running as the loco is on full current all the time (the pulse frequency is adjusted to determine how fast he loco runs), loco lighting options, sound when you can afford to buy those. You don't need to get too fancy for DCC. I have a quick Bachmann EZ track just for testing locos and new sound chips, running in new locos and the like and even that will run fine with a DCC controller. You can start adding droppers and all that business later