Harold at the Heliport Set Box

Sure thats true but the Harold set has 2 train wagons included with no engine right?

Yes I believe that is the case, Circled the part on the box that tells you what is in it.

There are other cases like the one above,
Sodor Rail Yards shows 4 trains, but comes with none. 


Knapford station also shows 4 trains, but came with none.

But the one thing they do all show is a picture in the corner of what is in the box. Except the one DalaGStanator uses above of Tidmouth Sheds.