1. a lot of clicking can be the fuel pump, sounds like it, esp if the gas is overflowing. get ur floats first, then u may have to do the diaphragm fix.
2. try lightly tapping on the suspect carb to see if that clears up the float with a rubber mallet, if not ur gonna have to crack the carbs.
3. oil can be the puke up near the airbox. how full is your oil? how new is your oil?
ticking, no idea.