If it's matched to the rod (designed to hold an 8 weight fly line) the reel should hold somewhere around 130-150 yds of 20lb Dacron or Micron backing. A spec sheet should be included in the box it came in, or you can search for the specs online. For backing you could go with Cortland or Scientific Anglers.
For fly line you'd want a 8 weight, weight forward Floating or Intermediate line to start. I'd probably go with a floater if you're fishing from shore, or an Intermediate if you're fishing from a boat. If you plan to do both, I'd go with an Intermediate.
You'll also want a leader, but you can make them easily with regular fishing mono. For a floater, a leader made with 3 sections of mono
4 ' of 30 lb test tied to 3' of 25lb test tied to 2' of 16 or 20lb test.
With an Intermediate, just a straight shot of 4-6' of 16 or 20lb test.
To rig it up go to the fishing knot section of animated knots:
Animated Knots by Grog
Backing to fly reel- Arbor Knot
Backing to Fly Line= Albright Knot
Fly Line to Butt (heavy section of leader) - Albright Knot
Leader sections to each other (for leader with floating fly line) - Blood Knot
Leader to Fly- Improved Clinch
Flies - a few chartreuse size 2 Clousers and some 1/0 Deceivers (all white, blue over white or olive over white) would be a good start
Hope this helps