The only way you could output sound from your tv, is by using the 'analogue' audio output from the tv (if the tv has one! red & white RCA output plugs) into the back of the Panasonic A/V unit. However, you will not get surround sound from that. It will only be in stereo ( 2 channel) The visual side would have to be component out from the back of the a/v unit to the tv - (again, if the TV has such connections! red, blue & green RCA connections)
I have to say though, this system will do your TV no justice what so ever! The dvd's you watch may sound ok, but the video feed comming from the player is not HD, and will not look very good on the tv - if you manage to get it hooked up!
My suggestion would be to invest in an A/V system that will...