can I use the tv audio out with surround sound?

Answer 1

The simple answer is yes..

What is going to produce the "best" sound is another question depending on a lot of factors and variables...Most people will have to customize sound quality for their particular situation; equipment; speakers, room and preference.

Answer 2

If the output you are suggesting from the television IS at least a four discrete channel output, delivering four discrete, and therefore surround, output signal paths, then yes. Otherwise no. However, your amplifier or preamplifier solution might include the ability to synthesize a surround, or rear presence output. check your manuals. If you mean to be asking if most surround amplifiers will also reproduce a stereo or monaural signal correctly, then yes, most will.

Answer 3

That would depend on whether or not your specific devices have compatible inputs/outputs. Since you chose to NOT specify what gear you have, no one here can even guess.

Answer 4

Maybe, if you do it according to the instructions in the Owner's Manual. 

Answer 5

Maybe. Too vague a question. Read the manuals for both.