2.2 DTI squeaks, engine emergency run

Hello, it’s time again, I need your help here in the forum. Such bad luck, so shortly before the end of the year! This morning I drove with my omi as usual to work. After 4km suddenly the power drops completely, engine control light and shortly afterwards also the oil control light goes on and the vehicle starts to smoke animally at the rear. Saw in the rear mirror white, but could also have been at the temperature (-8°), I also meant to make a slightly bluish shimmer too I immediately turned off the car and first looked at the front, if something has burst or something. But nothing unusual could be discovered in the engine compartment. Since I was totally unfavorable on a federal road, I started again and drove at the pace (no more went) to a parking lot 50 meters away and then immediately turned out again. The engine ran so quietly, except for the lack of power and the agony. At the first moment I have on Turbo typed and the ADAC-man also thought that this was possible. So he didn’t start any more, so that the Turbo might not even start burning off the oil. Car is now at the FOH and is waiting for diagnosis, which will probably take place only in the new year. I wanted to use the time to prepare for an alternative repair route. I was told a Turbo would certainly cost 4 digits. Has someone ever had this before? Are these the symptoms, if the Turbo is broken down Here? Or could there also be another cause? Would be grateful for your assessment. Greetings Wolfram