Stick inputs will all depend on the setup. For instance: I have 15 degrees of throw on my ailerons with about -25 to -30% expo (Futaba setting). This year I was flying Intermediate, which requires two horizontal rolls. For me the easiest way to do this maneuver is to push the stick to full deflection and use my rudder and elevator as needed while it rolls. I also had to reduce the total throw in order for the airplane not to perform the two rolls within a half second, so I set up a rate switch that changed the ailerons to 75% throw just for that maneuver. Now, I'm moving up to Advanced for next year, which will require different settings. No longer will I have to string together 2 rolls, so that low rate aileron won't be used, but I also won't be hitting the full deflection on the ailerons unless I'm doing a snap or maybe a spin. I'll be doing a slow roll and a 4-point roll, and with the higher rate settings I will probably use about 15-25% deflection of the stick in order to do these rolls. The reason I will still need to have the full 15 degree defelction available is for snaps I will now have to be doing. Now, that being said, I will answer your questions directly:

i. Stall turn - full rudder deflection
ii. Half roll as part of a maneuver - Probably 33 - 50% stick deflection (depending on how fast I need the roll to be completed)
iii. Elevator on top hat entry - 25 - 33% stick deflection, as with the roll this can depend on a lot of factors, especially if there's a strong head-wind