audio video out of a pc ?

[tteettuk]

Whats the easiest/ cheapest way to get a audio/video phonos out of a pc ?
Also I would like to have an internal amp/ speakers fitted in the jukebox/pc and also have the choice to have a line out audio video so i can watch/listen on a bigger screen and external amp and speakers.
I wanted it so in general use i listened to the internal amp/speakers and used the touch screen, to watch audio videos but be able to also turn on my av amp and watch it on my tv screen and listen to it through my av amp ? So I suppose i need two sets of audio out, but how would i control the volume ? I even thought of using an audio/video sender to send the audio/video to my av amp and tv ? Whats the best way ? thanks