You maybe lucky and the headgasket and the oil seals may be fucked then if you've got ALOT of what looks like

in your pipes
Do a compression test(or take it to a garage and they will do it for you) mate then you will know for sure weather your headgasket is gone or weather the water way in the turbo is cracked ect.. it's a process of elimination mate but you ALWAYS!! start with the cheapest things first because like safechav said guess work can just become an expensive hobby