Ta ta is strictly an 'England' English term, used less frequently in this day & age. It was a middle/upper class coloquialism for a casual goodbye, with an emphasis on 'see you again soon'.
Hope that helps our non-UK members
Should you need to understand any of the other strange language used by ppl on the Board, give us a knock & i'll sort you out with the lingo sharpish m8!
gimme everything u got