There were stains on the couch bottom were liquids had dripped down between the cushions, so I used my homemade oxi clean and a white rag to clean that.
For the dog hair stuck in the cracks, after I vacuumed, I used duct tape to pick it up. It works better if you scrape the hair off by rubbing the tape across the hair rather than press and pull.
There was a "tear" at the seam of the back, it looked like it had torn, but really it had just pulled away, so I squished the metal holding strip back into place by stretching the fabric back where it went and then hitting the metal gripper with a hammer to keep it stuck.
I had one small tear on the bottom flap that I whipstiched closed with a matching thread color.