Is there mayonnaise on the dipstick when you do dip the oil ? If so, headgasket is gone.

As for the oil have you got underneath and checked the underside ? Is there oil all over the place ? Could be an oil seal, or is there blue smoke when you give it some ? Turbo seals should be shagged and that'll burn oil. Need to have a good poke about first mate, there could be a multitude of reasons for both problems.