Some folks do tires and wheels and even lift at the dealer when new. Some wait until components wear out (like 100k miles for shocks) or until they damage something (running boards or bumpers, particularly the rear).
I bought at 49k. Roof rack went on a few months later. I did sliders the following year around 60k, and then new tires and wheels at 65k. I ended up doing a lift at 66k, though originally I was planning on waiting a year or two. Bumper went on at ~80k.
I'm at 87k now. I'd like to regear but may wait until I pass 100k since I have the Toyota 7/100k VSA and I'd hate to give Toyota an excuse to deny a claim, even if it's unlikely. I'd also like to do a rear bumper but I may wait longer for that since the LC is our DD and I think the double swing-out will annoy my wife.