There aren’t really defaults - it’s entirely dependent on what machine config and what motor controllers you have. Limiter polarity is whether the limit switch is normally open or normally closed. Direction polarity is whether the motor controller direction line should be +5v or 0v for positive moves. Key Polarity is just the direction that the keypad makes the motor move.
Enable the limit trigger, or at least enable homing. Play with Direction Polarity to make the motor move the right way when you power up. Limit Polarity is set correctly when the limit switch is triggered properly. You can test that without homing by looking at the diagnostics+ window in the controller menu and jogging to home.