Questions about going "no-poo"?

I just came across something called no-poo, in which people opt commercial shampoos for natural cleansers (baking soda, apple cider vinegar, etc). I think some people even stop washing their hair all together! I would like to give this a try because although I consider myself low-maintenance, I strive for that perfect/healthy hair. I really care for the environment and animals and this seems like a good way to be more green. Here are my questions:

1. Does the apple cider vinegar condition or cleanse your hair? Would using regular vinegar have the same effect?
2. Does going no-poo make your hair more healthy/shiny/strong? I’ve heard the baking soda makes the hair dry, and over time, dull and brittle. Is this true?
3. How often should I be washing my hair with this?
4. Is there anything that no-poo enthusiasts use as a sort of conditioner?
5. How long does it take before the greasy stage ends?
6. Can you use other hair products? I don’t want to cut out my serums and detanglers..
7. Do people use this no-poo thing on their face and body too? I mean, is there other natural ways that people cut out commercial products? I don’t mean just going organic.

Any additional info and tips also please (:

P.S I just tried this for the first time and my hair feels the same as if I shampooed it. My hair feels clean but is a little bit itchy and my scalp and ears are warm, like as if I just dyed my hair.