Setup advice for a Noob

I have just bought an 07 tundra. I'd like to change the set up and look of the truck but I'm a noob when it comes set ups. It's currently stock and I want the look of tires just outside the fender to give it a more aggressive look.
My understanding is that I need a leveling kit and spacers? Or can I level it and just get wider rims and tires?

 

Lower offset wheels or spacers , and generally changing offset further out will cause you to need a leveling kit to not rub. This was my truck with 275/60r20. Had a little poke maybe 3/4 inch or so with a level. Wheels are 20x9 +20 offset. Tires will play a part too, as now I'm on 325/60r20 same wheels with significantly more poke because the tires are so much wider