The loco is a 4-6-2 "pacific" type. It has smoke and "choo-choo" sounds, operating headlight and the lever inside is for direction control. It looks like the metal bell is missing from above the headlight. If I remember right the wire coming out of the tender had a plug on the end that went into the loco under the electric motor. The trailing truck swiveled like the pilot truck on that little "button" inside the bottom of the cab. Other than that, it looks complete to me. Here's one in "E-" condition for $65 (no pic)
http://www.amerflyer.com/leventon/list_used.htm
The combine I don't recognize, and the green ones look like they light up.
FWIW American Flyer runs on AC not DC voltages.
Lionel bought A. C. Gilbert (parent co. of AF) in the early-mid 60s(?) to eliminate the competion. Occasionally Lionel will reproduce new ones at BIG prices.
Brad