So many questions!
Orthodox Christians do not subscribe to the teaching on the rapture. You will not find this teaching in the ancient Church. In fact, if you trace it back (use your Google to research it) you will discover it isn't much older than a 150 years. We believe the Lord will return in the fullness of time. As for the anti-christ and the beast, there are books on this (one that comes to mind is: A Rumor of War by Dennis Engleman which you can order from this site: [
www.reginaorthodoxpress.com])
Best wishes,
James