This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Which Eclipse package did you download? You should have downloaded "Eclipse for Java EE Developers". If so, go to File | New | Other, then select Server | Server, click Next and under Apcahe choose the Tomcat version you are using. Click Next and fill in the information about your Tomcat.
And like David hinted, you should really be using the last Eclipse.