SR5 really meant it had "SR5" stickers on it... the upgraded options could be had on any truck... Cruise, A/C, Nicer "SR5" seats, Tach and real gauges instead of idiot lights... are a few common SR5 things.
Maybe on the 2nd generation but there were substantial differences in the 1st gen (1984 - 1989), all in the interior. I still own an 85 (Deluxe) that I bought in 86 and used to own an 86 SR5 that I bought new for the wife. I spent a lot of time looking at new 4Runners in those days and talking to dealers!
I never saw one without A/C and mechanically they were exactly the same. The SR5's came with the following (probably a bit incomplete):
Carpet (Deluxe had vinyl)
SR5 front and rear seats (lumbar adjustment, split rear seat)
Full instrumentation cluster (gauges instead of idiot lights and tach)
Overhead map lights
Altimeter/Inclinometer on dash
Deluxe center console with padded top
Electric windows and door locks
Cruise control (could be had in Deluxe but only aftermarket)
SR5 rims (Deluxe had steel unless dealer installed aftermarket)
Chrome bumpers front and rear
In addition, many of the Deluxe models had no rear bench seat. If it did have one, it was a vinyl (non-split) bench seat installed at the port. At the time I was told that all Deluxe models were imported without the rear bench seat as that helped Toyota with their import quotas (a big deal at the time). Apparently every SR5 model counted against their "car" import quota but the Deluxe models counted as trucks (which either had no quota or lots of head room on the quota).
The only "upgrades" that I have ever seen on a Deluxe was aftermarket cruise control, rear vinyl bench seat, and dealer installed rims (mine has all 3). The common aftermarket rim in those days, BTW, were the ribbed "turbine" rims. Great, hub-centric, cast aluminum rims. I still have mine.
BTW, I think $2000 is a good price. I wouldn't sell you mine for 5x that!
