Handling and storing sodium hydroxide, hydrochloric acid, hydrogen peroxide and isopropyl alcohol
You probably don't need a mask - vapours from hydrochloric acid can be a little noxious, but if you're diluting it down and using it in a reasonably ventilated area, you shouldn't get much of that. Isopropyl alcohol vapour is toxic like most alcohols, but I don't think an ordinary mask will prevent that, and you'll be better off just making sure you have enough ventilation. 

Standard white cotton labcoats are inexpensive and can be quickly removed if you spill a nontrivial quantity of something on them.

Hydrogen peroxide will probably come in an opaque container, but if not, it does break down in sunlight. Everything else is pretty stable to light, although you want to avoid storing the alcohol somewhere that's going to get too warm, because it evaporates readily and can pressurise the container more than is a good idea.

All these materials are pretty safe to store indoors in unspecialised storage, although for commercial purposes or quantities you may need to take regulatory precautions that will obviously vary by locale.

Edited to add: The copper chloride that comes out should be regenerated as many times as possible, but when you eventually end up with too much of it, you'll want to already have thought about what you're going to do with it - it's pretty toxic and you can't (or, well, shouldn't) just wash it down the sink.