Get the NGK plugs...pregap. They are like 7 bucks a piece at Autozone or O Reily.
Fuel filter is easy, just right under the
running board on driver side.
Everytime I changed my oil. I've also put "engine restorer" along with the oil. Increase longevity on engine. I did not do that when I had my landcruiser...and it was a mistake.