The diagram shows it only as DC, not DCC ready.
http://www.bachmanntrains.com/home-usa/dwg/dwgs/25127.pdf
Isolate the two motor leads from the pickups.
Use 1k, 1/;4 watt resistors for the LED's.
For the light bulbs, use 22 ohm, 1/2 watt resistors. Light bulbs have surge current when powered up which can shorten light bulb life.
A DZ126 decoder will work.
Some years ago I used a DZ125 decoder in the HO Plymouth, 0-6-0.
This assumes you have DCC install experience.
Rich
If you ever fall over in public, pick yourself up and say “sorry it’s been a while since I inhabited a body.” And just walk away.