SandPirate69,
The answer varies depending on what inputs and outputs are available on your TV and Surround Sound system. At a minimum, you must add a wire(s) from the TV output to the Surround Sound Input. This is where it can get dicey.
If your TV has audio output connectors that use the RCA Phono type of jack, and there's a matching set of audio input connectors on the Surround Sound, you can pick up a cable just about anywhere for a few bucks. They typically have Red and White color-coded connectors. If you have a video cable with Red/White/Yellow, you can use that, leaving the yellow connectors hanging. Note that some Surround Sound boxes have a single set of RCA Phono jacks that are not marked as either input or output, which is what ours has. Surprise, on ours the same connectors can be input or output. The brain inside figures out what to do.
If you don't have matching RCA Phono connectors on each device, see if there's another type of connector present on both; maybe optical audio. If you can't find matching connectors, you might be able to find an adapter that converts signals...
If you get the wire connected, the Surround Sound menu will have to be used to select that connector as the audio source. Some TVs also have to have a menu selection made to activate audio out.
You may want to review your manuals to see what inputs and outputs are available. If you don't have hardcopy, you can usually find them by model # on the manufacturers website.
As others have noted, there's a difference between getting sound through the speakers and getting 5.1 surround sound through the speakers.