I just want to make sure that I'm understanding right, but for this tile pack, I can use it for commercial use without buying anything?
If not, that's fine anyways, since it's a great pack and likely worth the money.
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For commercial use, you can use the tiles completely free.
The Iconset has its own separate terms which you can find on this page.
If you want to use the characters Reid, Priscilla, Gale and Michelle in a commercial project, you'll have to abide my RPG Maker MZ's license since they own those characters.
There's also a downloadable version here of all the commercially free assets in this pack.