You can create an AdWords account and start showing your advertisements in minutes. The AdWords interface is very user friendly and will walk you through the necessary steps as you move through the signup process.
AdWords is managed through an online interface, and to sign up and manage it you'll need an Internet connection. You also need an e-mail address, which will be associated with your account. If you do not have a Google account already, you'll need to sign up for one first.