My Ipad is behaving in a funny way. It is showing a halfmoon sign on top, doesn't stop talking and dictates everything. It makes me double click every application and I can't scroll down. kindly help
For the voice, it sounds like you have VoiceOver (one of the accessibility features) 'on'. Try triple-clicking the home button and see if that turns it off, and if it does you can then change what a triple-click does via Settings > General > Accessibility > Triple-Click Home.
If that doesn't turn it off then you can either turn it off directly on the iPad (you need to use a tap-to-select and then double-tap to activate/type process and 3 fingered scrolling) to go into Settings > General > Accessibility and turn VoiceOver 'off', or you can do it by connecting to your computer's iTunes : http://support.apple.com/kb/HT4064
For the moon symbol next to the time, you probably have 'do not disturb' turned 'on' (Settings > Do Not Disturb, and Settings > Notifications > Do Not Disturb)