Arnie Yusum Chevrolet!
Save the low, low profit way!

The Internet Archive has a collection of some excellent old TV commercials, some with jingles. Here are some of my favorites, including an Ajax and a Corona (?) cigar commercial ("Come up and smoke me sometime!") animated by the great Shamus Culhane: http://www.archive.org/details/ClassicT1948_3

There's a list here:
http://www.archive.org/browse.php?field=subject&mediatype=movies&collection=prelinger

You can get a list of the videos with commercials under
Advertising: Television Commercials

These are all before my time.