Nix

Today my 99 UK turbo decided that it was gonna put plumes of white ish smoke out of the back end and lose all power. I had no dashboard lights, no warnings, it wasn't overheating and I wasn't on the rev limiter. Any ideas as to what the problem is???? I am 1 month out of warranty and worried that it's gonna cost thousands to repair. I limped it about 1 1/2 miles home slowly and it had drank most of the oil....but no oil light. Please help.