squeak:
1) So nothing.
2) Everyone just shows up to the train station and the train takes everyone together to Hogwarts. As opposed to arranging and coordinating hundreds of portkeys.
3) I thought you were referring to the bodies of the Riddles. Now I see what you are referring to. So I guess this just proves that Voldy didn’t make a horcrux from that murder. Or it was made using a different wand. This also kind of begs the question as to how Voldy was able to perform such powerful magic in his pitiful state of existence.