- 17mm hex key
- fill to the bottom of the fill hole, till it starts coming out basically. This is with the box installed in the car and the car on a flat level surface. It'll take about 3 litres, total capacity is 3.1 litres but you'll not get every last bit of the old stuff out without separating the box
- yes plugs are both near the nearside driveshaft
- no washer or anything
hope that helps.