From this point, you will be working on fixing the new set of bathroom tiles. Remove the toilet pot by unscrewing the setup. Make sure you have the entire floor cleaned. You can do it by using a disposabl scraper and paper towels. More often than not, all the tiles will be of the same size. Measure the area of the bathroom and then calculate the number of tiles required to re-do the area with the new tiles. You will obviously need to cut some of the tiles to make them fit near the sides and corners as the area will not be as per the dimensions of the tiles. While you are cutting the tiles, be careful not to damage them. Get a good tile-cutter for this job.
Once the bathroom tiles have dried up, it is time to paint them. Barring the area that you will paint, cover the remaining area with drop sheets. Apply a thin coat of tile primer on the tiles. Make sure that you do not apply too much of it. Once the primer has dried up, use a sand paper to even out the surface. Remove the dust particles. You can repeat the application of primer and leveling the area with sand paper another time. Now, with a brush, apply gloss paint. Paint the bathroom tiles evenly so that they look clean and complete. Revamping the bathroom by replacing the old existing bathroom tiles with new ones, and then painting them can be a tedious job. But if done meticulously and carefully, the entire process can be smooth and effective resulting in a wonderful looking bathroom. This not only saves you the money that would be required to hire professionals, but also gives you a satisfaction of doing your home by yourself.