I am not attempting to fully educate you on this topic, therefore I am only answering a few questions, so that you in turn will do more research and don't limit it to what is stated here. I feel that once you research fully, you will recognize that Rasta goes far beyond those questions you listed below. I believe you don't take what people tell you as truth, you PROVE IT!, so here is some insight, now go out and prove it.. Jah Guide and Protect.
Number 2's answer which should shed light on number 8: you don't become a rasta, as one becomes a doctor or lawyer, rasta is something that has been in you from since creation, there comes a point in your life when you should stop denying the rasta in you, and embrace it. Rasta is not a religion. There are no set doctrines, etc.. every rasta interprets rasta according to them and their experiences. Rasta has promoted my spiritual (as opposed to religious) growth through learning about the creator, and my history
number 4: Now Rastafari has more than one house: The Nyabinghi, Bobo Ashanti, and the 12 Tribes, all represent an aspect of Rastatfari. Maybe you should learn about all the houses. I personally live my life in accordance with my King and vice-versa.
number 7: as my uncle told me when i was like 8, and I was wearing a bracelet with the ites gold and green in it, Red = blood of Jah people, yellow=the gold of Jah People, green=the land of Jah people. They are also the colors of the Ethiopian flag; simply put, red=blood, yellow=gold, green=earth
number 9: Marijuana is the Hola (Holy) Herb, as it was found on the grave of King Solomon. The herb should not be abused as a cheap thrill as some misinformed folks use it. It should be used for meditation and enlightenment. Others have used the herb for medication as a tea, etc...
number 10: Rasta's wear locks as what was once worn by the Nazarites. Some also cite that Rasta's wear locks to immitate the mane of a conquering lion. Others say that Rastas wear locks to denounce babylon and their ideas of fashion, etc.. But dreadlocks have been worn for centuries before rasta was popularized by holy men, kings , and scholars alike