I was able to put my stock stereo into my sisters 91 Civic HB, but yeah just like Pete said, the problem is that you would need a stock plug from Honda and mate it to a wiring harness for the Toyota. Since the civic had the same plug, there were no problems.
What these guys said is correct.
One thing I'll add is that the AFBS system is not controlled inside the head unit but rather this little black box in your trunk.
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