To answer any of your questions, we would have to definte what consciousness is first, and I don't think anybody knows how to accurately define it.
https://www.youtube.com/watch?v=APlw4xCl0xIMy favourite youtuber, he won't give you the answers you're looking for, but he offers his own insight into this question in an entertaining video.
There is also a puzzle game called The Talos Principle which deals with the idea that humans are nothing but biological machines.