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C is the TONIC or starting note.??

Nothing strange about this as you have seen it before.

There are 8 notes in the scale.? The last note is C the same as the first or Tonic note so the top one completes the? OCTAVE (meaning 8).?

As a reminder, observe that the 1st, 3rd and 5th notes in the scale of C are C, E, G.? These 3 notes when played together form the chord of C Major.? You will hear people talk about the 3rd and the 5th of a chord and might wonder how you can have a fifth when there are only 3 notes in the major chord.? Well, this is what is meant, it is the 5th note of the scale.

Other chords can be worked out easily on the scale basis when you come to learn them later on so knowledge of scales is a big help in learning chords and will be a big help to your future progress.

Later on as you play your scales you can also play the corresponding chord to compare the similarity of notes.