1. You can just use CleanRip and an SD card big enough to hold a single or dual layer disc. (16GB is more than enough for dual layer)
2. Save Game Manager GX for Wii games, GCMM for Gamecube ones.
3. Unsure.
4. Very resource-intensive. It has to emulate all of the hardware. Even a decent PC may drop frames.
5. Yes. You need a GC to USB adapter for the former and a bluetooth radio and sensor bar for the latter.