I have red Iguana sneezing all the time is that normal to do, and he also likes popping on the floor what can?

The sneezing is normal for Iguanas. This is how they remove salt from their bodies. You can train Iguanas to relieve themselves in a large container filled with water. This will take time and a lot of patience. It will not ever be completely "house broken" and you should not expect it to be.