Can a couch go in a garbage truck? How is it collected if so?

Answer 1

garbage trucks take household trash

usually for a larger item, like a piece of furniture
you have to call your refuse company - and they probably have one day a week to make those types of pick ups - there also may be a small fee - but that beats having to rent a truck and do it yourself

Answer 2

most require a separate pick-up.

you call. city or county..
where i live.. you take or pay some one to do so.