Buying a 6.0, what to look for

[LREhp]

So I am somewhat familiar with the 6.0, definitely not a pro though. I am looking at an 06 F250, it has just over 100k miles. It has had EGR cooler, and oil cooler replaced in the last 2k miles. It had an FICM replaced about 6k ago I believe.
It smokes a lil greyish white on startup, I've been told that's probably an injector issue. I drove it, feels like it has power although it's been awhile since I drove a stock one.
It most likely had a programmer on it at some point, judging by the uncovered hole in the firewall. The silicone couplers on all the piping seem to be pretty oily, turbo going bad?

Thanks for your help guys.