Welcome aboard! The snare, mt and bass are all Pearl, the Majestic was made by Star (which you may know, or not, is now TAMA), so this is a mix-n-match. The Pearls are likely a Valencia kit, and all are nice drums. The Star/Majestic is likely not a match, as far as the shell is concerned, because most of them are 9 ply, not 3 ply like the Pearl Valencia. Good drums, hope you didn't pay "too much". As far as if you need any pointer as to get the best sound out of them, let me know, it's "what I do", getting the best out of MIJ drums. I love the look. As far as heads, give Aquarian Z-100 Coated a try.
For the snare, I have a few tricks to get them up to a really good sound. Most people consider MIJ snares to be woefully sub-par, and yet I can tweak the last note out of them and make them sound awesome. Is it easy? Yes and no...but a little work never hurt a low standard drum. I can tell you, that snare, especially, will growl if you follow my instructions.