Robotman I

HEAD, NECK, PELVIS, LEGS, FEET, BICEPS & ELBOWS:
Marvel Legends Dr. Doom

CHEST:
WWF Kurt Angle (I think)

FOREARMS & HANDS:
Toy Biz Colossus from the Giant Sized X-Men Boxed Set

JET PACKS:
Not sure yet

DETAILING:
Kneadatite