I would change the secondary filter first as stated. The secondary filter is the one that looks like a spin on oil filter. Get an adjustable wrench and hold the bolt head at top and try to spin the filter off as you try to loosen the top bolt. Once it is loose the secondary will spin off. Try to fill the new one with some diesel and spin it back on loosely (for now). Next grab a screwdriver and loosen the hose clamps on the primary filter. This is the clear one on the driver's side of the engine. Replace it and tighten clamps.
Now, right next to the clear primary filter is your primer pump. Unscrew the plastic wheel until you can pull it out a little and it becomes free. Start pumping! It may take quite a few pumps but after a while you will see fuel start to come out of the top bolt of the SECONDARY filter. When the fuel comes out snug up the bolt. Then push in on the pump and screw it back in.

Your car should start after a few cranks.

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'85 300SD (formerly california emissions)
'08 Chevy Tahoe
'93 Ducati 900 SS
'79 Kawasaki KZ 650
'86 Kawasaki KX 250
'88 Kawasaki KDX200
'71 Hodaka Ace 100
'72 Triumph T100R