A:AnswerYes, the antenna goes with older TV's that are digital. If you mean older TV's that were manufactured before the digital tv mandate, then no. For older analog TV's you have to purchase a converter box and hook the antenna up to it in order to receive broadcast television.
A:AnswerOn the back of my HDTV is an "antenna in" port ("ANT IN") which you simply plug into. You will have to do some experimenting to find best location and positioning for signal reception. I played with it a few hours before I found the best spot. Mine sits in the corner of the top of the credenza next to my flat sccreen HDTV.
A:AnswerYes. I have mine behind the television. We scaled back our cable usage and found most of the internet television stations to be too slow. Plugging in the antenna and we have all of our local stations and some we never knew we had.