Are you saying you're not able to find the Eclipse download? Have a look here:
http://www.eclipse.org/downloads/
As previously mentioned, for
JEE application development, you wan the edition named
Eclipse IDE for Java EE Developers. This is the Galileo edition.
As for the pre-requisites for Struts 1, I don't know. Struts 2 is the current product. Are you required to use Struts 1? If not,
you should be learning with Struts 2.
Either way, just do a Google search for tutorials, and they will explain how to get going.
Best Regards,