Its got electric guitar playing melody. It has a cross section of woodwinds. Oboe, bassoon, piccolo, flute etc. Nice arrangement for those. All of the backing music is symphony with an electric guitar playing melody on top of it.
Good ear. The percussion sounds orchestral, and the xylophone adds a zaniness to it.
As I recall, a lot of the TV shows of that era started with orchestras and added "hip" new sounds like electric guitars.
Of course it's way before my time... ;-)