Most rings have 4 ropes, but 3 rope systems are usually acceptable. We bought our rope through a local hardware store, but it is not too much extra to buy from Ringside or online. It is heavy, so check shipping cost. Can be made with nylon, vinyl, misc. It is almost easier to buy pre-made sets.
Standard colors are red, white, or blue.
These are generally just your basic hose clamps . Great for attaching rope ends without having to splice the rope. They are always breaking, some brands more than others. Wire clamps are great, cost extra money. These are just metal loops.