Not sure if Marty set the Vref on the drivers.They may need to be set.
Have a look at this trouble shooting post for some tips and links to how to
Check the cables are plugged in securely.
For the Z going the wrong way swap the 2 plugs around… in the video the plugs have the red wire to the top change it to the blue wire is now at the top. This will change the motor direction.
The Extruder motor wont run unless the hotend is at least heated to above 170degC. Make sure your fan is running on the hotend before you heat up the hotend.
Check all your endstop wires are in the right spots on the board and secure.