Your microwave and range.
Veg, your microwave is an RRL series. I don't know the number, but it's a great machine. I use an RR-9. Your range looks exactally like the Whirlpool double oven range that was builder's spec when my folks bought their house new in 1986 in Manassas, VA. There was another version that had a microwave instead of the upper oven. I may be able to find an instruction book for it when I am home later this month. The only difference between your range and my parents' is the control panel to the left of the upper oven, otherwise it is all the same, even the exhaust fan on top.
My folks got rid of their range last year, but there are still a few kicking around the neighborhood. The most common problems are sticky automatic gas plunger valves on the lower oven, especially if it has not been used for a while. I'll always remember the slow igniter on the stove. That sound was a constant part of my childhood. Ka-tink.. tick, tick, tick, tick, foomp!
Let me know if you want me to look for some spare range parts for you.
Enjoy,
Dave