How do I install a new stereo in my 94 Toyota Tercell?

I bought a new Stereo deck for my 94 Toyota Tercell and I cant seem to get power to it. The color of the wires are different and also have extra mystery wires left over. I have looked up diagrams but none seem to help get power to the deck. I am not using an amp because the speakers are low volt. Any suggestions?How do I install a new stereo in my 94 Toyota Tercell?Ya may need to get a wire harness adaptor from auto zone or advance auto. That should help with the mystery wire problems. The adaptor will have some extra wire cuz it will be for a 90 to 98 Toyota adaptor or something in that range. Pretty cheap too.