l use Lava bar soap all over, it rinses quickly, with no residue and has some exfoliating grit in it too! This works well at getting your hair clean, will need some conditioner afterward though.
lf you're out of shampoo, dishwashing liquid works well and makes your hair smell nice.
For rough feet, you don't need a battery-operated gadget. l got a pot scrubber sponge with the rough plastic outer covering and scrub my feet with it soaped up. Works very well at a fraction of the cost of one of those gadgets the TV informercials push. You're welcome.
Shampoo and body wash are pretty much the same thing. A body wash might have a little extra oil which might make your a little oilier, especially if you have oily hair to begin with. But pretty much the same stuff.