How to hook up TV surround sound?

You might need an adpater / cable like this.
Here it is at Radio Shack, which they call “1/8” Stereo to Dual Phono (RCA) Plug Y-cable.”

You can’t get surround sound out of the TV. You need a AV receiver with multiple speakers and sub-woofers and HD / Blu-Ray quality input sound.
You can get “Stereo” out of a stereo TV ( two speakers and amps built into TV ) with adapter like @gasman.‘s plugged into a stereo system. This sound is lots better the speakers in the TV.
The green socket, I think, is for DVD connection, look for a white socket a “Headphone socket” and get the adapter.

Thanks!