The radio code is an optional thing. If it flashes up “SEC” when you’d switch on, then a code has been set, if not, there hasn’t been one set.
They are mk1 sport wheels that came on it (albeit without the wider rears), so a relatively rare wheel. I’d stick with those and get them refurbed if it was me. If you decide to sell, mention “Supra” in your advert title, the Supra clan love them, so you’d increase the market you are selling to, and with any luck, get a bit more for them 🙂