The ad which always made me smile from the 60s was "Old Spice, the mark of a man"!
A very, very young Patsy Kensit advertising Birds Eye garden peas. "sweet as the moment when the peas went POP"! And Patsy made the popping sound with her finger in her cheek.
A very early ad which I also loved was the "tingling fresh SR" toothpaste commercial.