NO, NO and NO!
DO NOT use public terminals to do sensitive transactions/emails. Not only is it to do with the temp files/cookies, but you do not know what has been loaded on the public terminal.
There are a lot of tools out there today which allows all sorts of snooping. People can load a simple program to remember all the keystrokes!! - and you can imagine the result of this...
If you think the information deserves secrecy, DO NOT use public terminals.