If you are looking for a value I can't tell you that because I don't know. What I can tell you is this.
Calhoun's Collectors Society was a business in Minnesota in The 1970s-1980s and went out of business in the mid 1980s around 84-85 I think.
They sold just about everything collectible at really high markups, from collector plates to coins to stamps to their own 24K gold plated stamp knock offs.
Like a telephone home shopping network before there was a home shopping channel (which might be what put it out for business).
It would have been a really bad investment for whoever bought that set, the only thing with much value would be the Kennedy half dollars
possibly based on their condition, the stamps and cards and medals might have some value to someone nowadays though just I don't think anything they sold would have ever resold for mare than they charged for it.
Anyways the medals might be worth something to someone, the half's might be of a condition worth some money if they BU and we're left alone since the 1970s or earlier whenever the set was produced.
I'm afraid there isn't much info on this type of thing, they made a lot of collectible marketing gimmicks to get into people's pockets 40+ years ago and they've been out of business so long now it's hard to find info on even the company anymore.