If you need specific cables, you'll have to buy them individually.
Otherwise, my "repair kit" would consist of:
- a bootable, fast USB stick with a virus scan&repair toolkit on it (probably Linux based, Windows has too many hasles with licensing)
- a bootable DVD with the same toolkit (for those cases where the computer won't boot from a USB stick)
- a decent multitool (I prefer Victorinox, in the US, it's probably Leatherman or Gerber)
- my smartphone with a WiFi scanner app
- one or two empty USB sticks
- a few adapters and cables to connect the sticks to either any PC or my phone
and if I really need to dig deep, a long handled magnetic screwdriver for those screws inside a PC (Philips #2. IIRC) and a wrist grounding strap. Perhaps a USB WiFi adapter so I can use my phone as access point while running on the Linux system from the stick.