I don't have any instructions for this. But if you unscrew the parts, you can see the possible fixing options. In my case, it was no problem to wind the cable from my old cable reel onto it and install it.

Depends on the thickness of the cable... Equipped with a thin cable, Brennstuhl sells this reel with 50 m of cable.

Normally, yes. After that, I think it depends on the length of your hose, but you can wrap a garden hose around this item yes.