Stick Hidden

How many catfish can I stick inside a 10 gallon tank?

It has live plants, a cave to hide in, and I have all of the supplies. All I need r the fish. What kind of catfish should i stick in there and how many?

10-gallons is too small for any but Pygmy Corys.
This is a pretty good list of the few 10-gallon compatible fish you're likely to find at your fish store, along with some good stocking options.
http://theaquariumwiki.com/Stocking_a_10_Gallon_Tank
Whicever fish you choose, be sure to first cycle your tank, http://www.firsttankguide.net/cycle.php
and add them slowly.
More general fish profiles:
http://www.peteducation.com:80/category.cfm?c=16+1911
and
http://www.aquariumlife.net/fishsearch.asp