Help please kangaroo qq

I've just bought a j10 1.5dci. Car ran sweet for a few days and now I'm having issues. The car started murdering when I held it at a constant speed followed by eml light. Code read air flow meter, clutch pedal switch and ascd function. We cleared the lights and I drove on. The car murdering has gotten much worse to the point it was struggle on idle and murder in when setting off as well as hold at constant revs. Now I code read it again when plugged in the engine ran perfect. This time dpf not at temp, clutch pedal switch again and ascd as well. I cleared the lights and the car ran perfect for about 2 miles and then off it starts again. Any ideas guys? I'm gonna start with the clutch pedal switch butter the issues seem a little severe for just a switch

Bloody predictive text

Juddering

The car broke down this morning. Replaced the clutch switch and it idled much better but wouldnt rev took the dpf bolt out and all the pressure screamed it's way out so blocked dpf it is. Trying oven pride tomoz. Realy don't wanna buy a new dpf at £300 plus