Chances are the toxicity mentioned here is asbestos.
- If you don't disturb it then it is fine.
- For example, installing new green flooring over the old asbestos flooring would be safe.
But if you want to remove it, you need an asbestos abatement company to do it.
The first thing you want to do is get the tiles checked by an asbestos inspector.
For more information:
You should read Rick Goyette's Ask A Pro Q&A, "Are national funds available for taking off or covering old asbestos siding? How hazardous is handling old asbestos siding?"