I don’t know what any of these wires mean

Good:

The Echo is up and running, new (junkyard) alternator, and new plugs and fresh oil has it sounding like a new car. Might do a coolant flush and maybe transmission flush, but for now it’s fine to drive.

Bad:

Whoever wired the stereo is an idiot. Previously, there was some aftermarket head unit that the previous owner took out. I had this wise idea to “oh, I’ll just put in another aftermarket stereo” only now I see the harness in the Echo is different than the Toyota standard one and doesn’t match the ones I have for the new radio!!

I have no clue what these wires do.