You've got a standard rapid fixer; ammonium thoisufite-based. It fixes faster than the "conventional" sodium thiosulfite fixers.
Read up on, say, Ilford Rapid Fix ( http://www.ilfordphoto.com/Webfiles/...0218312091.pdf ) and use those recommendations as a starting point.
You may or may not want to use the Ilford archival fixing sequence, which uses "film-strength" fixer for fiber-base papers. I prefer not to.
The hardener is an acid. Most of us do not use hardening fixer any longer. Unless you need hardener for very soft-emulsion films like Efke, etc. then I would not use the hardener.
If you don't use the hardener, take it to the local hazmat disposal site if you don't know how to dispose of it safely yourself.