|here ya go...
DTC 17951 P1543 Throttle Actuation Potentiometer Signal too Low
DTC stands for diagnostic trouble code. the next number is the volkswagen specific designation for this specific trouble code. the p1543 is the generic obd2 trouble code where p stands for powertrain, 1 stands for manufacturer specific (if it were a 0 next, it would be a governmental / sae standard code). and finally 543 represents the problem circuit.
sometimes when jumping a car if the cables are attached battery to battery it is possible to cause problems to other electronic components. or if you do not have a good ground this can happen. sounds like you have access to a parts car seeing how you say you already bought 2 tb's. try getting your hands on a used potentiometer, what actuallly controls the opening of the throttle plate, and replace that. should fix your problem.
a potentiometer is merely a type of actuator / sensor.
hope this helps, and kudos to whoever said that earlier.