I have the 885 White Sonic and what Ken has stated is what you'll need to do....you will need 3 decoders for the train if you what light control of the head and tail cars. To wire the Motor you will have to solder the decoder in place (unless you use the KAto slide in decoder) The decoder install for the Sonic is the same for the majority of Kato passenger sets. You will need Kapton tape to isolate the motor.
Here is one I did on a 500 Shinkansen:
http://www.jnsforum.com/index.php/topic,155.0.htmlBut take a look in the DCC platform and there are lots of posts for installs for motor and head & tail car lights.
Good luck.