Sounds like this is just a Limited, not an XT, so the turbo wouldn't be a concern.With one owner it should be easy to verify the maintenance. Definitely ask about oil changes and new turbos. Maybe the turbo failed and now you have a brand new one, thats a plus, maybe it never failed so you'll have to pay attention to it.
To the OP, you'll still want to verify the records as far as a timing belt & oil changes.