The way most cable companies operate is that they offer both cable TV and cable internet via the RG59/RG6 wiring that comes to your house. In order to access the internet, you will have a RG 6 line from a wall jack > Cable Modem > Router > devices (computer, PS3, etc). There will need to be a cat5e or cat6 cable run between the cable modem and your router as well as from the router to the devices. Your PS3 is wireless so you don't need
an ethernet cable. The cable modem will have to be purchased or leased from the provider, in your case, this Kraus Cable company. Or you can buy one from Newegg, best buy, walmart, etc. Also, you will be on the hook for a router. Most people go with a wireless router as it has both wired and wireless options in addition to providing a physical firewall.
I apologize if this is an over simplification, but I'm not sure on your knowledge level. If any of this doesn't make sense, let me know and I'll try to clarify