If you are referring to the MiniDV tape format, you have to use the camcorder to playback. You connect the camcorder to your TV via the included cable. It's pretty simple - just check the camcorder manual.
At some point, you may want to convert the video from tape to DVD. It's a little more involved, but the advantages of DVD are worth the effort.
If you want to transfer the tapes to DVDs, you should probably use a computer. You'll need a firewire cable and port on your computer as well as some software for making the DVD.