What are the steps and equipment necessary to make a plasma TV
purchased in the US (Panasonic TH-50PX60U 50" Plasma HDTV), work in
India? (I know India does not yet have HDTV broadcasts, but what do I
need for watching the Standard definition broadcast there, and HDTV
broadcast when it is available).

It seems not very probable that your TV set would work in India. Aside
from the usual problems with different electricity standards and power
outlets, the main problem is that your TV set does, as I found out
through the product specifications on Panasonic's US web site, not
have a tuner for the PAL TV system. But unfortunately, PAL is the
standard they use in India. So far, I have not seen a PAL to NTSC
converter one can put between the antenna cable and the TV set.

Scriptor

I don't think I need a PAL to NTSC *converter*. Just an external PAL
tuner should do the job.