I have to agree with the above comments, not ALL turbos are bad, and we tend to only hear of the experiences with bad ones, people generally dont tend to post about the things that are still working OK in their cars.
The issue seems to be more pronounced when a downpipe is fitted to the car, others have just had it happen at random, some have seen the smoke a handful of times, never to see it again, the issue with the factory turbo seems to be the machining (or more to the point lack there of) of the housing where the seal sits, the rough surface prevents the seal from seating correctly and fluid escapes into the hot exhaust section.
Im not going to sugarcoat this....every option of repairing this is going to be expensive, depending on your intentions with the car, and your budget, options range from remachining / rebuilding the stock unit, to fitting a new, bigger turbo.
Nearly all men can stand adversity. But if you want to test a man's character - give him power.
Abraham Lincoln