Okay. If you have a gamecube controller, you can try the SaveMiiFrii method (which probably wont help much, but would give you system menu version.
If your wii is or was at one point attached to wireless, you might be able to get the MAC address from your router. If not, if you can launch games, you should be able to launch the hackmii installer using a game exploit. If you can launch MMM using any of these techniques, your questions will be answered.
Just for giggles, was bootmii ever installed? (does the blinky blue light blink 1x or 2x on start?)