Pippa's Gymkhana Set came with all you see here apart from the pony and doll. The following year the five barred gate and parallel poles were available separately.

Shown below is the Gymkhana Super Set, released in 1976. This set came with a doll, probably Emma, though some people have sets with Pippa. The picture shown here, from Trevor Davies, still has the accessories in a sealed plastic bag so it is almost certainly authentic.