|Most TV companies have a web presence that will allow you to watch TV programmes over the Internet. All you need is a computer with a decent browser and a good Internet connection. The TV itself doesn't really come into it unless you want to relay the picture from the computer to the TV.|
To do that you need a video out connector on your laptop, either composite video, which is usually a yellow RCA socket, or S-Video which is a round multi-pin socket with corresponding connections on the TV.
However, you do need a good Internet connection, 2Gbs broadband at least. It will be extremely slow if all you have is dial-up.