Hi All, I Have a 2.1 12v td 406 v reg, the problem is i was coming back from holiday on sunday and while on the motorway doing 70ish

i could hear a very faint tinkle noise a bit like a wind chime. i slowed down and it disapered so i drove on at 55mph and 20 mile later a loss of power followed by a burts of power which i had no control over, i engaged the clutch and the engine continued to rev at 3000rmp this went on for 5 sec, i pulled over on the hard shoulde and got out thats when i noticed a trail of white/grey smoke i had left behind which i could still see and it smelt relly funny like oil and diesel both burning together. only living about 6 miles from where i was an haveing no breakdown cove no one to ring and the fact that it was raining heavy i checked the oil which was at halfway and decided to try and statr it. Well to my suprise it did start and ran fine, i was nearly home and at the bottom of my street there was a bit of clatering and loads of that white/grey smoke and it cut out, i tried to start it once again but this time it turned really slow and did not start. i rolled it back and bump started it and got it back on my drive and left it over night. the next day i went out and poped the bonet to see if anything i could see was damaged bit it all lokked fine a part from oil splatter around the back of the engine buy the vacume pump, i onec again checked the oil which was now no registeringon the dip stick. i filled it back up and started it it started first time tick over was fine but would not rev past 1500rpm without loads of smoke and a few rattles. i then noticed smoke coming from the engine bay so went to look and it was coming from back of the engine and out the dipstick hole this white/grey smoke, my mate who is no machanic but knows a little said it was my turbo that was nacked and if i disconected the big black hose that went to the plastick inlet manifold it might work, well i did it and it did rev higher but with more noise and loads of smoke coming now from out the plastic manifold pipe. the question i want to now te answer to is could it be just the turbo that has broken creating all the symptons or is it more drastic.
sorry for the long story but i wanted you to get the full picture any advoice would be greatfull
ps the car runs on tick over without any smaoke or noises
regards
Ryan