I can confirm that in #6, the two fork-shaped items between the film drying clips and the Jobo Print Drum clips are extension arms for a Jobo Processor lift assembly MINUS the rollers. You can take the rollers out (or put them in) for larger drums, such as the 2500 series print drums or the 3000 Series Expert film developing drums.
These are more typically found on the ATL Series of Jobo Processors.
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#3 just looks like a hose clamp of some sort.
#1 rings a bell, but a shot on-edge might help identify.