To login to the router you would perform the following steps:
1) open up a browser window (Internet Explorer, Firefox, Safari)
2) in the address bar up at the top (where you would type in the name of a website) type in 192.168.0.1 and press ENTER
3) this will bring you to a login page, do not type a username or password leave them blank, just click the login button
4) Once you are logged into the router, click on the word "Wireless" next to the word "Setup" across the top of the page
This will take you to the Basic Settings tab of the "Wireless" section of the router setup. On this page you will see the options to enable or disable the wireless, make sure the dot is next to "Enable." Below that you will see "Wireless Network Name (SSID)" the box below that shows the name of your network. That is what you should be looking for when you try to connect to your wireless network.
If you are unsure of your wireless password you can change that information while you are in here. Click on the "Wireless Security" tab next to the "Basic settings" tab. The Pre-Shared key field is where you would type in your password, it needs to be at least 8 characters.