You still need a wireless router. This is a cable modem only which I have connected to a wireless router. I think Motorola does make an all in one unit. See: http://www.amazon.com/Motorola-SURFboard-Gateway-SBG6580-Wireless/dp/B0040IUI46/ref=sr_1_1?ie=UTF8&qid=1384978619&sr=8-1&keywords=motorola+cable+modem+and+wireless+router
Any DOCSIS 2.0 or DOCSIS 3.0 device should work on any TWC system. You will have to call their technical department to have the MAC swapped on your account. Once that happens, they will update your modem with their bin file and you will be up and running. There is at least one review of successful deployment of this device at TWC Raleigh.
Hi Rae, I'm not really knowledgeable about modems, but I found a pretty good article that answers your question, I hope it helps you:
It's not significant how current the firmware is. When you connect and activate the cable modem with your ISP, they will automatically flash it with the latest firmware and probably some customizations of their own. Firmware update should only take about 1-2 minutes.