To answer your question honestly we would need to know what outputs your TV has. TV make and model # would be enough.
It may have a speaker out, therefore you would not need a receiver/amplifier, or maybe it doesn't and you will need one.
Example: my TV is a little older and has both speaker out (no amp needed) and digital out for a receiver/amp, I use a receiver for the surround sound and sub woofer.
At that point you need to decide, surround sound, 4.1, 5.1, 6.1, 7.1?