An answer of two parts, part one:
From what I have seen, http://www.hightechscience.org/toru.htm is the only site to include Salyut in the list of stations with TORU installed on it.
And I do believe it is erroneous.
I read a really long time ago, and unfortunately cannot remember where I read it, but it pretty much covered the same as the comment posted and as already mentioned in your question, namely that it was first introduced on Mir.
The paragraph I recall reading, which someone else might be able to relocate, went along the lines of the Russians had been looking at a way to replace Kurs.
As they felt it was quite expensive, especially as they had had to introduce a second unit on Soyuz and Progress as a back up to the first.
TORU was the touted replacement and the Russians sent it up to get installed on Mir, and to test it with docking Progress.
If successful they could dump Kurs and build cheaper versions of these craft with no automated docking.
They tested it with a Progress that ultimately was found to have unsecured cargo inside which meant unpredictable behaviour when movement commands were sent to it, leading to the collision.
The rest is history.
As the other comment says, I have never seen a mention of TORU on anything earlier than Mir and therefore can not have been installed on Salyut.
This then is the 2nd part to my answer:
http://www.svengrahn.pp.se/radioind/mirradio/mirradio.htm contains a list of radios and radio frequencies and what they were used for on Soviet/Russian space craft and space stations.
As you can see, the TORU frequencies are pretty consistent and I think its clear that TORU was never installed on Salyut's and the webpage cited earlier is incorrect.
Soyuz TM (7K-STM) 1986-2002
121.75 MHz is the main FM voice downlink (same for all prior Soyuz models)
130.167 MHz is the main FM voice uplink
Note the introduction of the 130.167 MH uplink.
This matches with this being the first Soyuz model with the new Kurs system (compatible with the later TORU) that replaced the Igla auto docking system.
130.167 An FM voice link used during EVA. Also used to transmit TORU commands to Progress.
121.75 MHz can be used as a receive frequency also including receiving TORU signals from Progress
Zarya - ISS Control Module (formerly known as FGB) 1998-
130.167 MHz TORU transmit to Progress and to Orlan space suit.
121.75 MHz receive TORU signals from Progress and from Orlan space suit.
Zvezda - ISS Service Module (Construction began..)1986-
130.167 An FM voice link used during EVA(3.5 W) and in the VHF 2 mode. Also used to transmit TORU commands to Progress and to Orlan space
130.167 Used to receive TORU signals from Zarya
Hope that helps..
Excellent page that I am surprised has survived this long: