That really is a mishmash of random bits and pieces. I really don't have any idea exactly what any of them belong to. I can have a punt but It's not 100% certain.
Going by the pieces of papers with the numbers on,
Photo one: I really can only spot two things I recognise here, The obvious one being a wood lathe tool rest and the other a little to the top right of it looks to be a small face plate for screwing pieces of timber too and mounting on a wood lathe. The long U shaped pieces on top look like "banjos" from a wood lathe also, and I assume the T shaped pieces are what clamp them to the bed of whatever machine they belong to. The other stuff I have no idea
Photo two: Stumped on whatever that stuff is
Photo three: Top left is some kind of metal lathe cross slide, below that to the left is an old fashioned tool holder and below that again is a nice looking live centre for supporting the end of a workpiece. The rest of the pieces I have nary a clue, the top-right piece looks a little like a machinists jack stand for a mill but I could be wrong.
Photo four (Second post): Random assortment of pulleys.
Photo five: (Second post): Top left has some faceplates, the one with the slots is for metalworking and takes bolts and clamps to hold material to it, the other two are wood type screw ones. below that is some kind of tailstock, to the right of that looks to be some kind of grinding wheel? to the top right of the faceplates looks to be an engineers 90-degree bracket. No idea on the other three pieces.
Photo six:
As Sam Said, some old exhaust clamps in the middle and a couple of pulley blocks in the top right. Big ol' tin of assorted ball bearings in the bottom left, Bottom right has a couple of hole saws, up again has a "tank cutter" and more hole saws above that. Above the holesaws looks to be as Sam said some kind of drill sharpening device.
Photo unnumbered: Not sure what the top left part is, some kind of motor mount perhaps? To the right of it you have some assorted drill bits, some morse taper shank and some straight, to the right of the drills you have a small assortment of punches, top ones are parallel punches and the ones below are tapered. Below the bracket is some kind of pulley and below that looks to be another wood lathe faceplate. The rest of the pieces allude me.
Someone else here might be able to help more and find the diamond in the rough but most of this I would consider junk. I'd say sell the live centre, drill bits, punches, hole saws, tank cutter and drill bit sharpener. The rest of it could possibly lumped into one listing as a job lot and sold that way rather than scraping them or trying to sell all the individual unknown pieces. A lot of the random pieces seem to have the same colour so possibly they all belong to a machine somewhere. Sorry I couldn't be of more help.