My dad passed away unexpectedly, my mom gave me his 2010 Tundra.

Welcome from NC! Prayers going out to you, your family and friends...

 

My dad did all scheduled maintenance and did it all at the Toyota dealership. He never did any mods and I like your idea of keeping it as he did for awhile before I do I any customization.
I took it to the dealership to have an inspection performed, changed the oil and had the brakes done. It runs great. He had gotten new Michelin’s within a few months of his passing away.
In the future I would consider doing a small lift nothing too much and some new rims. I need to restore the headlights as the casing is very opaque and yellowish. I waxed it, restored the black trim and shampooed the upholstery and floor mats.
It’s a great truck.