Okay. Once you've paused the replay, hold Shift and then press P to go forward by one frame.
When making a replay and you say .. have the turnframes as 10 and you only want to go foward by 1 turnframe, just hold shift then press P or Shift then Space.
When watching a replay, hold Control then press { to go backwards one replay and Control } to go forward one replay.
Hold control then press N creates a new replay.
Pressing F saves your replay.
Pressing R replays your replay. (if you are halfway through making your replay and want to see the progress, press R)
Hold control then press enter puts Toribash in fullscreen ..
Can't really think of much more, hope it helps