Help needed from Sweden

[FunLight]

Hi there everybody. I bought me a -94 Cheyenne with a 6.5 TD a couple of days ago. The a-hole seller has been smart and removed the lightboulb behind the "service the engine soon" warning. Now I found out that the picup has no less than 7 codes that needs fixing. My problem is that I don’t have a clue to what the codes refer to, and how to fix them. Ok, I can read the list of codes in this post, but I don’t know what it is that needs fixing and how to do it, if you guys know what I mean. Ok, here are the codes, and now I hope for mercy from you dieselpower loving guys on this forum. 17. High resolution circuit fault. 18. Same as 17 I think. 32. EGR circuit fault. 33. EGR control pressure barometric sensor circuit high. 35. Injection pulse width error short duration. 45. EGR vent error 78. Turbocharger wastegate solenoid fault. I have invested some serious money buying this picup, and I’m holding both thumbs and toes that there is possible to save this engine without me fileing for personal bankruptcy. Hope for help. Regards from Michael in cold Sweden.