New in the 1971 ad (replacing Spider-Man and Bingo from the Banana Splits) were Heckle and Jeckle (well, at least one of the madcap magpies) and Bugaloo Boy.
The Heckle and Jeckle costume is pretty good, with a nice demented grin. Ideally, however, you would need two kids to be wearing the same costume to properly depict the pair of identical mischievous birds.
As for Bugaloo Boy with his antennae, I’m assuming he was a character on the Sid and Marty Krofft show called The Bugaloos (another show I don’t remember). Unfortunately, only a female version of the species appears to have survived the inevitable trash bin or garage sale.Anyway, the pumpkin lamp shown in the Gray Drug ad is on eBay right now. Here are a few photos from its listing.
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Here’s the version of the lamp with dancing skeletons that was mentioned in a comment.