On the bottom, this is a Forte, it means to get

softer.

This is a whole note. You have to hold this for 4 beats.

This is the G Cleft. it is on the top which Means the it is played by the right hand.

This is the C cleft it is on the bottom, it is played by the left hand.

This is the flat. this means that you would play an the black keys.