- Wrist bands, or ESD straps as they're known, you can get them from Amazon or your local electronics/hardware store. Otherwise, you should work on/build your PC in an area with hard floor. Carpeted area may attract unwanted static and can ruin your day.
- You will have to decide which power supply to buy since you will need to gather what PC parts you have (or going to buy). Minimum I recommend is 500W 80+ Bronze with a minimum 5 year warranty if you're strapped for cash. Power supplies are the one thing you should never cheap out on, but you should also never overspend on especially if the hardware that's plugged in doesn't even reach the max spec.
- Any screwdriver kit will work, even a knockoff iFixIt kit. Get one that has all the common Phillips head as well as uncommon bits where you may run into those situations of these so-called proprietary screws. (take for example the Pentalobe screw Apple used on their products)
Inquire for more information if you need.