1. No, they won't.
2. No, 60,000 (kms) on mine, mostly on Flip's EBCs... Guessing rotors at maybe 100,000????
3. Me, too, scoring on all rotors, but thickness still OK. Took the emery cloth to one rotor one time, haven't bothered since.
New pads will not pretty up the rotors... the pads will soon wear to match the rotors, possibly a bit grabby for a few applications...???
Give the rotors a bit of a drink of Brake Clean & a wipe over lightly with wet & dry paper to clean off any gunk.
Yeah, I have a bad habit of over-using the rear brake too ... but I'll never admit it.