Originally Posted by Jiffylush
no, the router would be to access the internet via multiple hosts
Yes, you need a router. It's true that a router is only needed to access the Internet from multiple hosts, but the OP said that he wants to download listings to his TiVo (that's one host) and unless he has a broadband connection and doesn't want his computer to access the Internet, his computer is host 2.
Some (most?) routers contain a built-in switch.