Turbo squealing

[Wiseman]

Very possible cause for to much smoke after idling is leaking oil from shaft seal ! There's not enough temperature to burn it off during idling and oil accumulate in the housing. Other possible cause is exhaust valves stem seals popped out of the valve guide and oil seeping into exhaust manifold. Both causes are very bad for everything down the line !
I think most likely your turbo is gone . At this point there's nothing to be afraid of . Just pull it off and use it to learn . Make pictures. Ask questions. We're here to help !