1990 Ford Tempo right front wheel is more or less, not movi

sounds to me as though your brake caliper is sticking

you can remove pads and pump out the caliper piston till the rubber bootseal is easy to pry/lift away from piston. see if rust/dust is visible and try lubing behind/under seal with a rust dissolver like WD40 or just use brake fluid. use clamp to work piston back in. if too much resistance is found then maybe rubber brake hose is internally blocked/collapsed. loosen bolt holding it to caliper and see if piston moves easier. if so, remove hose and test by having pedal pushed to see if fluid flows freely and easily.i f not replace hose/bleed caliper reassemble and do drive test.

calipers will be replaced. I had decided this before asking the question, but was wondering if the heat being generated could be from anthing else , before going ahead. Thanks for the comments, and I will let you know if this solves the problem.
The disc appears to be ok, ie not warped... but their is some discoloration... Is this a problem? disc needs replacing?

Thanks for the comments, as it turns out as suspected it was the Calipers.
I was concerned with the slight discoloration of the Disks, but I clean them up and they seem to be working fine!
Thanks to all those who submitted comments(jeepfan and fixitmr). I don't know how these points work? How do I get points? How many points to give if comment was helpful? I gave point to the fellow that was first to suggest it was probably the calipers.

Thanks again,

Chris