hi levipad 
you have some interesting questions and iām trying my best to answer them with general information but also with my own experiences.
1)
WBTB is not THE BEST method to be used with WILD, it is also possible to induct a LD just by WBTB itself but it can be used with MILD as well. splitter already gave you a link to the āwhat method should i useā thread and i would recommend youā¦ since youāre highly motivatedā¦ to use MILD. i had a lot of success with it so you may have it, too ^^.
and by the wayā¦ try reading this:
klick me
2)
wellā¦ this is something beyond normal peopleās limit, but it IS possible to have lucid dreams without using a method. i heard about one and once succeded in another. except from those two i have never heard about people getting LDs without using a technique. a pretty experienced member of this forum once told me that if youāre a real master or just highly talented 
it is possible to simply know the difference between dream and reality. having achieved this level of skill - this is my opinion - i think you can call yourself a lucid dream deity^^.
the one i succeded in a few days ago was like this:
i dreamed about going out with my girlfriend and there was this guy who seemed to be pretty keen on herā¦ well i somehow kinda knew that when i think he will get herā¦ in my dream it will come true and i will be the loser, but because of the fact that i knew that i wanted this guy so much to get his f****** hands of my girlfriend i became lucid. just by having such a strong will to control the dream in the direction i wanted it to goā¦ i became lucid.
next question
3)
well some people report about having had a SD, but there is no scientific proof that this is possible. so wether you believe it or notā¦ it existsā¦ or not : D.
i hope my answers could help youā¦ see you next time ;D