Welcome aboard! That is quite a change. Lots of useful advice here, both from the active participants and the archives.

I doubt the pads were original. I just replaced mine on my 04 at 42.9k miles. I might have gotten another 4k miles on them. The sensors hadn't tripped yet. I didn't replace the rotors. I'll probably get another 15-20k miles out of them. At my current rate, that's 10+ years