New to me!

Hey y’all. I just got me a 2008 S, original owner, with 17,800 miles. This thing is mint.

My question is, the guy was really good with the oil changes, but never did the trans, diff, brake line, coolant, and clutch line. I know these thing have a mileage recommendation, but what about time wise? I’m going to have it all done when my mechanic can do it, about four weeks out. Should I not drive the car much until it’s done? I can’t imagine the gear oil is still good after this long, but correct me if I’m wrong please, and thank you.