No issue at all with the default settings of a "standard" decoder. It should simply work with headlights one end and tail lights the other. Reversing the direction of the loco, will reverse the head/tail lights. If you want to the red lights to work independently, there is a simple mod using the green and purple wires of a 4-function decoder.
If you require details of the mod, e-mail me, replacing nospamplease with newbryford.freeserve in the email
Cheers, Mick