Gellyneck
LIFE MEMBER
From the page you linked to -Not anymore on the 770 model, I cant speak for the others though.
Live traffic reports ended 30 June 21
Garmin Traffic via FM is achieved through the power \ aerial cable linked to above.
https://activegps.co.uk/garmin-gtm-36-traffic-receiver.htm#compatible
Garmin agent verbally confirmed this during a telecall.
He also advised my existing Camper 760 cable \ aerial may work but couldn't be guaranteed.
Tried it and it seemed to when encountering a delay on M5 about three weeks ago.
As above.As others have commented, we also have a Garmin 780 which does everything on your list. Disappointed have to use phone for live traffic (the bosses far older car Garmin doesn't need outside help), but it seems so far to do what we need.
Our Camper 760 still gives live traffic via FM (assuming it's power cable is not connected to our 780 though!).