>>894706Replacing a toilet can be really really easy, or really really hard. You won't really know until you've got it out.
I had to do one where all the retaining screws had rusted and snapped, and all the sensible places you could conceivably move the toilet to already had stubs of screws that had rusted and snapped. The floor was covered with some kind of ceramic tile, that drilled at about a fiftieth of the rate the concrete floor below did.
After backing out all the screws that would back out, and grinding the rest flush so they wouldn't crack the porcelain, the toilet was finally reseated. EVERY SINGLE JOINT LEAKED.
Turns out, if you leave an old perished washer alone, it works just fine, but the moment you disturb it, it's game over. The shitter needed to come out again, and have every single washer in every single joint replaced.
Contrariwise, if the retainers aren't rusted to fuck, and the washers aren't perished, and it's a Good Toilet Day, it can literally be a case of unscrewing it, and screwing the new one in.