ok do i just crumb coat the cake and then put fondant or do i crumb coat and then do another layer and then fondant?
just a crumb coat will work. Just make sure it is as smooth as possible as your fondant will show imperfections underneath it.
I've tried it both ways. I like it better with just a smooth crumb coat underneath. I think it's too hard to get smooth with too much underneath. Just my two cents!
just your preference really on how thick you want whatever you are using under the fondant
I just crumbcoat and then fondant.
I also just do a crumbcoat then fondant. Every time I have tried to do a thicker layer of icing on top of the crumbcoat, I have problems with the fondant pushing the icing downward and causing bulging out the bottom of the cake. Probably just my inexperience, but for now I'm sticking with a crumbcoat
I also just stick to a crumbcoat -- putting too much icing on the cake before putting on the fondant can cause all sorts of problems - the biggest one is that you would have icing oozing out everywhere - big mess