ok what is this stuff for?

Obviously the stuff that was actually mentioned in the ad: a bench top bottle capper, a Sanke keg coupler, and another four random keg couplers.

Then there's the glass jar thingie that might be some kind of hop Randall - the end of the red hose looks like it might fit the keg coupler, but the pic got cut off so we can't see if there's another connector there (but there must be something - you can't do much with just a "goes into"

Finally, there's that hefty metal thing on the far right with the two barbs poking out and with what looks like an ill fitting top (sure doesn't look centered, does it?). I have no idea what the heck that might be...

Cheers!

I'll give you my version.
Metal thing on the right: a hop randall (adding hop flavor in between keg and glass)
Glass jar: beer line cleaner