Do I also need a modem?
We are moving into a housing complex that has free WIFI. The property manager states we just need a router and when we plug that in our internet will bring up a home page asking us to set up an account to the service which will offer faster speed upgrades if we want. Does this sound correct? We are trying to get things lined up right away so it works when we move in.
My answer may not quite fit because your post is a little vague.
Do you mean free *WiFi* or free *Internet*? You wouldn't need your own router if there's free WiFi - all you'd need is the SSID (network name) and passphrase (if any). You'd also possibly be on the same network as everyone else, which isn't a good idea (no privacy, and very little security).
If you mean free *Internet*, it depends on how many devices you have that need Internet access and whether or not they're wired or wireless.
If you have phones, Tablets, gaming consoles, and other wireless devices, you'll need a router.
If you just have desktop/laptop computers that only need a wired connection, you can probably get by with a network switch (5, 8, 16, 24-port, depending on how many devices you have). Hopefully this helps a bit.