Philips SDV2210/17 UHF/VHF/FM/HDTV Indoor Antenna

"Plasma HDTV"+"Philips SDV2210/17 UHF/VHF/FM/HDTV Indoor Antenna"

(1) Enough to watch some TV channels without any other purchasing/paying?
(2) Still need to buy converter box?
(3) Still need to buy converter box and pay monthly fee to TV company?

Which is correct?
Thanks.