Re: Removing ceramic tile
Difficulty level will depend on how well the tile and substrate was installed and your personal tenacity.
You will likely cause some damage to the subfloor (assume it's wood? ), though probably not all that much, certainly that can't be floated out or patched before you install your hardwood. I'd start with a crowbar and hammer and try to get under the tile backer board. If you are indeed working over a wood subfloor it should separate relatively easily if a cement based product was used, if it was an adhesive, all bets are off.
Wear protective clothing, face and eye protection because you'll have shards of tile and debris popping in all directions. Don't worry about the screws, they can be removed with pliers or bent over and broken off, whichever you prefer. If you need to rent a rotary hammer (aka rotohammer, chipping hammer, etc. ) go for it, but use extreme caution not to dig into the subfloor. Some subfloor damage is to be expected, don't worry about it.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!