I would contact the mfg and ask them if they can provide gold buttons for you. No one else will have the same ones except them. You may have to settle for the silver ones but it doesn't hurt to ask. I'm sure they have a customer service department. Might need a plumber to replace them if you can find them. Good luck!
You can order a land through home depot
Jean: I suppose if you had thick tile installed over your original flooring you might have to go with a thicker ring. If not, the supplied ring should work just fine.
All colored fixtures are more expensive because they cost more to make.
did you turn your feed line valve all the way on?
no, unfortunately you will need a minimum of 11 inches from the wall for clearance.Mine is 12 inches from the wall and I only have 1 inch to spare. sorry
Yes, they are included.
Ask HD. They do a round bowl version buy I would buy it unless you have space issues.
Dick: Toilet comes with everything you'll need except the water supply line. Even comes with a seat.
I wouldn't disable it - only use the 1.1 flush button if a male urinates and doesn't use any paper. Otherwise, simply don't use the 1.1 flush button.