When was Federal Center SW - WMATA station - created?
Federal Center SW - WMATA station - was created in 1977.
Eternity, since WMATA doesn't go any where near Disney World; it barely reaches south of the Beltway, let alone all the way to Florida. Your best train option would be to take the Metro to Union Station in DC, then get take the Silver Star or Silver Meteor (Amtrak train routes) to Orlando or Kissimmee Florida. The Amtrak part of that trip takes 17-20 hours, plus around 30 minutes from Falls Church to Union Station…
Some Metro buses do run on Sundays, as do the Metro trains; however, the buses run on an abbreviated schedule, and not all routes are covered. You can plan your route on the Washington Metropolitan Area Transit Authority (WMATA) website. The website not only tells you when the buses run, but the best routes to take from one point to another. http://www.wmata.com/rider_tools/tripplanner/tripplanner_form_solo.cfm