Welcome to Coin Talk! You'll have to provide clearer pics of the coins. It's difficult to tell what you think makes them errors.
Welcome, we may need better pictures, from the obverse of the nickel, it appears to be 2 cuds, but looking at the reverse it appears to be damaged, the quarter I really can't tell so I'll refrain from commenting on it.
This coin looks like it has taken a lot of hits since it left the mint. It may have been found in a parking lot where cars had been running over it.