There are many free email services available. A few of the most popular ones are:
Gmail (from Google)
Live.com (formerly hotmail)
Click on the link and then click where it says to get a new account. You will have to enter some personal information and then select an email address. It is a good idea to write down your address and account password somewhere safe. Be careful not to lose your password or to leave it lying around where other people can see it.