Don't pull the padding off the toe. I have the 2011, but I am pretty sure that hasn't changed. That padding folds up allowing you to screw the bindings to the board but it wont come completely off.
You adjust the gas pedal from underneath. There should be some notches and you can use a screwdriver to pop the teeth out and then adjust the gas pedal to the right length at which point you can snap it back into the desired notch.
Don't rush it, you can look it up on youtube. Don't f*** your new shit up