The starting problem would point to checking the Transmission Range (TR) sensor which is located on top of the transmission housing. On a '97 the black/yellow wire is connected via TR sensor contact to the black/green wire to allow start in only P or N.
Sorry, but I've no ideas re your power steering (other than check fluid level) and radio symptoms.
98 Mystique LS v6 atx 110,000km
97 Contour LX v6 atx 125,000km
stock CD on LS, cass on LX
spoiler, tinted windows on LS only
4 wheel discs on LX only
All other available options on both
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