Routine maintenance, new oil & filter 5,000 miles or once a year whichever is sooner.

New spark plugs 20k miles or so, same with the air filter.

Drain and top up the gearbox fluid about every 50k miles or so.

Anything mechanical like shocks, ball joints, tie rods or track rods are able to last much longer than 100k miles provided you don't get into a crash or drive like a demented orangutan.

See below:

https://carkiller.com/scottykilmer/qa/2017-ford-expedition/

Don't skip any maintenance that's recommended in the owner's manual, or on your instrument display.

Find a trustworthy mechanic and visit them once in a while for a thorough inspection. Catching things early can prevent greater damage, and will save you money.

A Toyota can last you forever as long as you keep up with maintenance and by not driving it rough. Look at Scotty's 94 Celica it's still on the road. Toyota has a great reputation for quality reliable engines that last forever.

Do what maintenance of fluids that you're comfortable doing (oil, gear box, transmission, coolant). Check your air filter and cabin air filter, fairly frequently. (Four times a year, for example). 

Use Top Tier gasoline. The full report on Top Tier designation, from AAA, is here: https://www.aaa.com/AAA/common/AAR/files/Fuel-Quality-Full-Report.pdf

And pick a Top Tier brand and stick with it, as much as practicable. (They are all good, but additive packages are different, and constant mixing can create problems). 

If you live in the snow belt, have the vehicle "Fluid Filmed" to prevent undercarriage rust. As Scotty says, "rust never sleeps," so prevention is key.

Don't skimp on tires. Buy first class tires, whatever your road conditions dictate. 

Finally, no one will fuss over the micro-details of maintenance than you. For the things that you can't tackle, find a good diagnostic independent shop, for non-warranty work. Stay away from a dealer or a dealership for routine maintenance, or even diagnosis.