The ssid is the "name" of the wireless part of the network, and your router may or may not be set to "broadcast' it. Better security if you don't, just make sure the TiVo, and anything else you've got connecting wirelessly, knows it.
That's not the same as the password, which is only called for if you use WEP or some form of WPA.
That's not the same as the password, which is only called for if you use WEP or some form of WPA.