wheel fitment

hey everyone, im new to the toyota forums because ive always been an avid nissan fan. i sold my 97 kouki and bought a 86 ae86 gts to use as a commuter car for work and job. im very familar with 240s and i know alittle about the corolla. one thing i have been wondering though is what would be a good offset for rims and what companies make them with such negative offests. i have jun overfenders and in one of the magizines a guy with the same setup was running 15x9s with a -27 offset in the rear. i want to keep it clean but i feel i need to go with 16s. im not going for huge rims, i just want some bronze wheels that i dont need to add huge spacers to. i like the fn01rc and the te37 but in 16s they only do +43 offset (for civics). do you know of any clean 16s that come in 16x9 with about a -10-20 offset?

I don't have any kind of info about where to find the wheels. I have a few question of my own. What is the offset? And the number of offset in what direction is it? And what that number represent, in, cm, or %? And what's a kouki?