As with tube radios, recapping is standard, beginning with the electrolytics. Here's some basic info about that, if you need it.
http://antiqueradio.org/recap.htm
TVs have higher voltage than radios, and the vertical & horizontal sweep sections demand precise timing, so there's generally less "fudge room" than when restoring many old radios.
If you follow the schematic and take your time, it's not an impossible leap from radios to TVs, although there definitely is a learning curve if you want to understand how your TV works.
This article discusses restoring a model T-100, which I think has the same chassis as a T-120.
http://antiqueradio.org/RCAT-100Television.htm
Have fun!
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html