The fixer will work fine for paper as well. Just dilute the concentrate more, and store the working solutions separately.
Same for the stop bath.
If you are doing a lot of darkroom work, you might consider one of the larger sizes of fixer.
From the same site (AG Photographic), any of the neutral tone print developers should be fine.
“Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”
Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2