Judy, if you're doing it as an excursion, then yes all beach facilities will be included. When we went in Sept., all five of us got chairs and rafts, they ask for your room key as deposit for the umbrella (i didn't quite get that, but it was easy). They even set everything up for us.
They have water trampolines, a climbing "iceberg", paddle boats, kayaks, a swimming pool with a swim up bar, a restaurant (didn't try, we stuck with snacks) and from responses I got when I asked, the food was good. Our excursion included all our drinks also, soda and beer.
They also have showers and changing rooms.
It wasn't much for snorkeling, we saw very little, however I did see the largest starfish I've ever seen in Cozumel.
Hope this helps.