everything but it not starting is normal after opening the fuel system and doing this repair. The misfires after startup are due to air in the fuel system. The no start however is not.
The smoke from the passenger side of the engine is likely due to the gasoline running oil and debris down onto the exhaust manifolds, when you started it they heated up and burned it off. With all that fuel in the exhaust it usually takes a good drive to get it to go away.
So as i read it now, the noise is gone and the smoking is gone? Sounds like its fixed.
Turbo seals leak oil into the exhaust, and would come out your tailpipe, not the engine bay. Only exception to that rule is if its a feed/return line leaking and then you would need that, but your turbo seals are not this issue here.
BMW master tech
2010 E92 335i 6-speed 25k miles. - For sale.
1989 E30 325i coupe 5-speed DD