Computer Type PC/Desktop System Manufacturer/Model Number Intel E6550 OS Windows 8 Pro CPU Intel (R)Core2Duo(TM)2.33GhZ Memory 2.00 GB Graphics Card 256 graphics memory Monitor(s) Displays Generic Non PnP Monitor Screen Resolution 1024 x 768 (32Bit) (60Hz)
Keyboard DELL Mouse Logitech Wireless Mouse Hard Drives 60 GB Internet Speed 100MBPS Browser IE Antivirus None
Normally, you would be able to set your signature in your User CP in the Edit Signature settings. However, since you are still a "new" member, you will not be able to until you are no longer classified as "new" after X amount of time and posts.
The link below can help show you more details about reputation, ranking, and badges.