Told forth means "counted out", typically done in public (counting out money for a payment as you might do in front of a shopkeeper, rather than counting your money secretly).
It appears an old-fashioned usage, both this meaning of "tell" and of the specific expression "told forth".
Tell can mean "count", as in the King James Version where God tells Abraham he will have lots of decendants: "And he [God] brought him [Abraham] forth abroad, and said, Look now toward heaven, and tell the stars, if thou be able to number them: and he said unto him, So shall thy seed be." (Genesis 15:5) This example is given in Merriam-Webster's entry for tell, with the sense "count, enumerate".
In "told forth", forth is used with its standard meanings in Merriam-Webster, here "out into notice or view".
The Jacobean poet Ben Jonson wrote "Here's one outlived his peers / And told forth fourscore years" in To the Immortal Memory and Friendship of That Noble Pair, Sir Lucius Cary and Sir Henry Morison. Here it is a metaphorical sense of counting out years, meaning living to a certain age.