dude, after reading ur other thread.. please do more research.. i literally researched AAS for two years before i finally jumped in, and i still have A LOT to learn.. I still havent done my cycle, and i will not until i have everything i need, and know everything i need to know..
these questions you are asking can be learned in about 1 hour of studying.. but im not your daddy, and im not going to preach to you, but remember, its your body you could fuck up, not mine. My favorite place to research different AAS is steroid.com
good luck