Capt Pit Bull is correct - no TCAS aurals on the ground.
However if there was a TCAS equipped aircraft flying overhead the runway then they WOULD get an aural "TRAFFIC TRAFFIC" as well as a visual TA - even though they may be at 5000 feet and you are close to sea level.
The CAA has mandated TCAS for certain aircraft. But they have not mandated that all transponders should provide altitude information. Unfortunately, this is a case of half a regulatory job being done.