Set my "Settings" choices some days ago on the Toledo. Used the wife's fob today and found that the "Settings" functions were entirely different. I take from this that the functions are peculiar to a particular key?

Seem to recall reading that in the manual, but I haven't used the function on the Toledo. Whereas on my Mustang a few years back, I did. My key activated remembered seat position, mirrors too, custom dashboard and lighting settings, audio defaults. Brilliant idea.

You can set individual settings for up to four keys in the infotainment system.