I'm running 4.2.2 (Jellybean) myself and the option to move to SdCard is in Settings>More>Applicatons Manager. Tap an App you might want to move and if the Move to dCard box is lit up, it's possible. Those that can't or won't move will dim that box.
Leave USB Debugging on because you need it every time you connect to your PC or laptop to back up photos, etc. Did you enable it after tapping About Device seven times to enable Developer Options? If not, do that now - it's a serious suggestion, not a "dance round the oak tree naked at midnight" hoax.
Uninstall APPS2SD in case that's what is upsetting things. Maybe the screen has issues of its own.