Start-Run and ipconfig in WIn 8

Hello!
I’m trying to use a single cable internet connection for 2 desktops, one with WIn XP, and the newer one with Win 8. Obviously the older PC already has Internet, but I don’t have a Start button in WIn 8 like in WIn XP and WIn 7. How can I USe the run, and then ipconfig /all commands in win 8?

Thanks in advance.

Ivan Popov