With the DCC hybrid method you can use a small DCC decoder that will only source an amp or two and use it to power your lights and sounds, then use a large ESC to drive the motors. Often, for smaller locomotives and railcars, a 2 amp DCC decoder will handle everything but if you want to avoid the cost and need something bigger, this may be an option.
Generally if you are purchasing all the parts at once, it’s more or less a toss-up between the hybrid method and the full DCC option. I had several small decoders I was using and a couple of older ESCs so I added this option.
Basically, this is just like the battery hook up except you wire in the decoder and leave the motor drive wires from it disconnected. The ESC drives the motor and you wire the DCC decoder light and sound outputs normally.