Is it Illegal for Toll Booths to Reject US Currency?

I have dozens of rolls of lightly circulated 1960-D Small Date Lincoln cents, 1968-S to 1974-S Lincoln cents, Jefferson nickels with various die breaks around the rim, etc.Is there any collector value to these?

As with any other item there ‘may’ be someone who is interested in purchasing these coin rolls at a modest premium. Generally speaking, roll collecting isn’t as popular as it was in the past. Since the coins you identified are modestly scarce there may be some interest in them. In general, rolls of ‘lightly circulated’ common date coins will only command face value.

The phrase “United We Stand” was made popular during the aftermath of 9-11. I found that same phrase on some Civil War tokens. What was the origin of that motto, and when did it first appear on a token, medal, or some other form of exonumia?

The phrase “United We Stand, Divided We Fall” originates from ancient Greek storyteller Aesop in ‘The Four Oxen and the Lion.’ Similar phrases appear in the Bible in Matthew 12:25, Mark 3:25, and Corinthians 1:10. Its first appearance in what would become the United States likely is in ‘The Liberty Song’ by John Dickinson published in 1768. Since that time both Kentucky and Missouri have used the phrase on their state seals and state flags. The first numismatic appearance of the phrase “United We Stand” is on 1832 Henry Clay presidential campaign tokens. 

The Peace dollar commenced in late 1921, the only thing in the design alluding to peace is the word appearing on the reverse. How and why was this coin dubbed the ‘Peace’ dollar?

World War One (also known as The Great War) ended in 1918, the same year as when the Pittman Act was passed. This led to the desire to commemorate the event. Congress passed an act in 1890 authorizing coin design changes no sooner than 25 years and also included a clause that allowed both the 5-cent nickel and silver dollar to be changed “as soon as practicable after the passage of this act.”

Where is the largest portion of the Kennedy half dollars (mid-eighties through the 1990s) struck and intended for circulation?Would they remain in the U.S. Treasury inventory due to lack of demand from banks [and] as a resulting fact that most of the large earlier strikings are not being used in commerce, hence remain in retail bank inventory which in turn results in lack of demand for a resupply?

The final ‘nine figure’ or more than 100 million coin mintage of Kennedy half dollars was the 1976 Bicentennial emission. The date was frozen on this issue and produced both during and outside calendar year, 1976. Mintages declined significantly after that date. Today the half dollar is struck for collectors rather than for circulation. I don’t have any Treasury statistics on what is in inventory, however the Treasury is under no obligation to supply banks exclusively with coins of the current calendar year, nor are they under any obligation to return older un-issued inventory to the U.S. Mint.