vw golf mk4?

hi i bought a mk4 golf 2 weeks ago seemed ok when bought, but i still kept my eye on the oil levels during the week and it has been droping!!! and blue smoke when reving and in low revs
its on 86,000 miles so i give it a service an its still the same, cleand the air fillter, some oil ther, cleaned the breath pipe, creamy gunk inside, smoke wasnt so bad after bur still ther.
had advice and not looking good, worn pistonring!! equals new engine!! not a happy bunny