Hello All, I’m new to the forum and hoping I can get some help diagnosing some issues with my B7 Audi a4

Recently noticed abnormally loud turbo noise when under hard acceleration more audible than usual turbo noise, then later started to see some smoke under acceleration. (This all happened across about a fortnight or so of normal driving and commuting but could have been happening longer before I noticed)

checking under the bonnet there was oil collected around filler cap and also oil leaking from throttle body presumably coming through from intercooler?

EGR valve was very chocked up with carbon build up also.

on the turbo side of the engine there is oil leaking from the turbo hose and also oil in the intake hose which looks like it’s coming from the crankcase breather.

what are your initial thoughts on what is causing the issues?

thanks, Matt.