PoIIux

What kind of internet connection do you have?

If you got DSL, you'll want to connect the modem to the wall jack with a regular phone cable. Then, from the modem, you use an ethernet cable to connect to the router.

Then you connect the PC to the router with an ethernet cable (you already got this I believe), and set up your router to enable the wireless connection.

Then you set up the laptop to use that wireless connection.

If you got Cable, you connect the router to the cable modem, connect your PC to the router, and set up the router to enable wireless connections. Then, configure the laptop to use that wireless connection.