Cleaning a Fabric Couch?

I need help. My husband and I bought a used double recliner couch and a queen size sleeper couch from a church, both for $60! But we need to clean them. I know you have to be sure to use the right techniques (the right cleaning chemicals and equipment) according to the type of material the couch is made of.

Now, I know to check the tag, but there is no tag, anywhere. I don't want to mess up the great deal we just got. How do I figure this out? And what is the best way to clean these puppies out?

By Stellar