Ditto what Sixto said.

1) No need for the in-tank strainer.

4) I think you are confusing the Hall sensor with the flywheel sensor. As Sixto said, the flywheel sensor goes to the EDS, you'll need the diesel EDS, KLIMA, and tach. The Hall sensor is actually on the back of the speedometer, the output is used for the cruise control, radio, etc.