The tile guy who replied previously is correct - removing ceramic tile is the
hardest removal that a home owner can make. He recommended a chisel or air
hammer - a chisel will definitely work, but it can be labor intensive. If
you can find a Lowe's or a Home Depot, you should be able to rent an
air powered floor scraper- it would be easier on your back and give you a
faster removal rate. It should also allow you to remove all the floor
coating, including any thinsets or glues. Good luck with your project!