Bob McKenzie in 2051 AD
This seems like a fairly simple costume as far as construction of parts goes because it is almost all found items. It may be made difficult if some of those items are no longer available because the film was made so long ago.
The helmet is a green hockey helmet.
It looks like a blue "Star Trek" looking shirt. It either has black cuffs or maybe it is electrical tape?
The pants look like regular black trousers, with an athletic cup worn over the top.
It looks like calf-high rubber boots. The tops are rolled over and labeled with Bob's name.
His accessories include a yellow and black ping-pong shooter with holster, a red and silver tape measure, and green army-type web belt.