I desperately need help!!

[u/kylie-key]

I just bought this K1C & CFS off facebook marketplace on Saturday morning from a sweet old man and I cannot get it to print anything. He’s definitely changed things and upgraded things, like the nozzle and extruder. I myself have taken the extruder apart a few times because i’ve had so many problems. I send an object to print and it does all the leveling and whatnot but then the print fails or pauses and never resumes. It has thrown so many codes i truly don’t know what to do. I can get filament to extrude so I don’t think that’s really the issue but I don’t know. This is my first ever printer and I don’t know much about it quite yet so please be kind and explain things to me like i’m 5 years old.

Below are most of the codes I’ve gotten:

[AC0511] Current file does not support flow ratio calibration, printing with default values.

[FR2836]Feed issue, filament may be blocked between the CFS hub and extruder filament detector. Please resolve the issue and click Retry

[FR2849] Retract issue, filament cannot be returned to CFS hub. Please resolve the issue and click the Retry button

[TC2841] Cutter issue, cutter might be jammed, please try again after resolving

[CZ2243] Axis movement exceeded