Sometimes a song does not begin on the first beat of a bar. Any notes which come before the first full bar are called lead-in notes (or pick-up notes). When we use lead-in notes, the last bar is also incomplete. The notes in the lead-in and the notes in the last bar add up to one full bar.
On the cassette there are five drumbeats to introduce this song. Do not confuse the staccato dots placed above or below a note with the dotted half note, where the dot is placed to the right of the note.
A black box sitting on a line of a staff is called a half note rest. It means two counts of silence.
A black box hanging from a line of a staff is called a whole note rest. It means four counts of silence.
In this song, whole note rests can be found in bars 3 and 7 of the bass staff. All the other rests are half note rests.