what class of airspace? IFR and VFR are only separated in class B and C (I think!)
In a similar scenario even traffic info will not be available if the warrior is unknown (eg operating a few miles from the end of the runway but outside the ATZ and in class G airspace.)
There's an interesting report in the latest CHIRP about pilot's not being aware of the different classes of airspace.
Re TCAS. not much use if the warrior is not SSR equipped.