In Render Globals where it says "Frame/Animation Exit" choose any of the options other than single and you'll un-gray out the area allowing you to set your start/end frames and everything else related to it. My suggestion is to use: Name#.ext as far as how the files are output. Leave your frame padding at 3 if you are doing animation over 100 frames. If it's under 100 you could use 2.
"Terminat Bora Diem, Terminal Auctor opus."