1. the self cast is now part of the default Blizzard interface ( the configuration can be done in the interface menu ) if active you will self cast when targeting an enemy or targeting no one at all
2. If your looking for a cooldown addon on the action buttons I recommend OmiCC :
http://www.wowinterface.com/download...36-OmniCC.html
If your looking for cooldown bars addon :
http://www.wowinterface.com/download...ownTimers.html
3. To show up the SCT/SCTD option menu type /sct menu or /sctdmenu in the chat bar.
Hope this help and welcome back to the game