Hi disacrazy, the HTC Radar is set up to share photos/music/video wirelessly, using DLNA technology. You will need a tv or monitor that supports DLNA, then the steps you will follow are: Main Menu > HTC Hub > Featured > HTC Connected Media. Choose 'Install' then complete the steps to connect your phone to your tv.
Because the HTC Radar does not have an option to change the Tv Out setting on the display, I am not aware of a simple way to connect a cable from your phone to a standard tv and share media. Other users here on the forums may have found a way to do this, but I have not.