Your laptop should've picked up the wireless signal from the router by now. Hmmm, from what you've posted above, this is the router you have:
LINKSYS WRT54G IEEE 802.3/3u, IEEE 802.11b/g Wireless-G Broadband Router
Are you sure your laptop has wireless turned on? It's usually a button somewhere where you have to manually enable it. My Dell laptop came with the wireless "off". I flipped it "on" and it worked.
If it is "on", you need to connect to your network which is through your router. Are you running Windows XP or Windows Vista?
Either way, you need to go to Start button/Control Panel/Network and Internet/Connect to a network.
You'll see a bunch of other networks that show up. Click on the one that has the maximum signals (which will likely be your router--it will be labeled as Linksys I think) and double click on that to connect.
For Windows XP:
Right-click the wireless network icon in the lower-right corner of your screen, and then click View Available Wireless Networks.
The Wireless Network Connection window should appear and you should see your wireless network listed with the network name you chose. If you don't see your network, click Refresh network list in the upper-left corner. Click your network, and then click Connect in the lower-right corner.
Windows XP prompts you to enter a key. Type the encryption key that you wrote down earlier in both the Network key and Confirm network key boxes, and then click Connect.
Windows XP will show its progress as it connects to your network. After you're connected, you can now close the Wireless Network Connection window. You're done.