The steel wheels are standard on the Mk 1 S. All the other higher spec models come with alloys. Steel wheels on the Mk 1 have the 175/65R14 tyres. Alloys on the Mk 1 are 15". Later models have 15" and 16" alloys.
Looks like you have an S. If your A/C is working, then with cold air blowing through and the A/C off you get ambient air. Switch the A/C on, and withing several seconds you should be able to feel a marked drop in temperature of the air from the vents. My Volvo would give you hypothermia!
The S didn't have remote locking so it looks if you have replacement keys. Open them up and see if there is anything in them, and if so, try a new battery. Perhaps your car has been upgraded at some time in its past.