You could buff it with fine steel wool, but you would probably not get an even appearance and the coating is extremely thin with brass underneath which will tarnish.
Vanessa Minnillo, an American actress and TV personality, was born to Helen Bercero and an American father.
Without knowing the coins' dates and mint marks it's impossible to say. You could check out a site such as www.numismedia.com and look up each coin individually. However, it's a pretty safe bet that whatever coins the seller selected are worth less than what the set cost, otherwise they'd go out of business in a big hurry. indian head penny..yr 1906 liberty nickel...........yr 1900 barber half dollar..yr 1915 barber quarter,,,,,yr 1898 barber dime ......yr 1903. all sliver