I think you have a couple of things that could be addressed as "weekend" projects that might help the car. The idle hunt when warm "should" be an easy fix and the targa bar refresh would make the car show better. I think for the rust I'd take it to a shop for a repair estimate to at least be armed with that bit of knowledge when someone wants to negotiate on your price due to the rust.
I'd put the rocker covers back on simply because it will show better that way. I'd also put the torsion bar covers back on. In the pic of the drivers side (7th pic) it looks like the cover that would go over the ducting or footwell blower is missing. Also looks like the door pockets are missing or someone did RS panels with the standard door handles. If you have those I'd put them back on as well. Best to have it looking as complete as possible. If there are missing pieces I'd go to the used parts section to see if you can source them.
Oh... and you might want to toss in a pic of the engine. Folks always like to see the engine.
I think these two would be a decent reference point for where your car would be if the condition matched.
https://bringatrailer.com/listing/1984-porsche-911-carrera-targa-22/
https://bringatrailer.com/listing/1984-porsche-911-carrera-targa-21/