As said if using dsub connection, audio is not possible. If TV and graphics card has Hdmi you can use that instead and set TV in Windows audio playback devices to default.
VGA cable (15-pin D-shaped connector) does not carry sound. You'll need separate cable from your computer' audio out / headphones port to TV' audio IN.
As said if using dsub connection, audio is not possible. If TV and graphics card has Hdmi you can use that instead and set TV in Windows audio playback devices to default.