Here's my thinking: If you have power to the shut-off solenoid, fuel to the IP, but none to the injectors, either you have an air leak or your IP is has a problem - of course GP may have also run the fuel system dry which would appear like an air leak.
Priming the IP and lines out to the injectors should get you by an air leak for a short time, and would fix the symptoms of the system being run dry - if the issue reoccurs it's probably an air leak, and you can track that down by torquing the fittings and replacing seals.
If you're not able to re-prime the fuel system then this will take more work - if the lift pump is getting fuel to the IP but your injector lines stay dry, they your cut-off solenoid or the IP are the likely culprits. You say you believe the cutoff solenoid is working, so it would point to the IP. Either way if it goes this direction, you're going to have to pull so stuff apart, so you might as well install a reman Stanadyne IP with a new solenoid at this point.
If you crack open your injector lines and fuel comes out, your injectors are the likely culprits. Injectors can be tested and cleaned - if your individual injector lines are flowing fuel, it would be good to do this. Replacement injectors are not that expensive, should be $400 or less for all 8.
If you do all of these purges, primes, and checks and it still doesn't want to turn over - if there is "smoke but no fire" and your block is cold to the touch, your glow plugs may just be shot. For your own piece of mind, you can pull the plug wires and test the glow plugs for continuity to the engine block. If any show open or infinite resistance, they are burned up - again replacements are not that expensive, and should be part of at least an annual maintenance regiment.
Of course doing these checks also reminds me that with an unknown engine on a new vehicle that may have sat for a long time in a field, check your air piping - critters of the furry kind have a habit of moving into confined spaces and blocking air flow. A tear down and visual inspection shouldn't take that long (maybe an hour or two max). You'd be surprised how little obstruction it takes to suffocate an engine...
Nice to hear how things turn out. ![[thumbzup]](https://www.steelsoldiers.com/images/smilies/icon_smile_thumzup.gif "Thumbs Up [thumbzup]"){kind=icon}