I don't know exactly which story r2d2 is telling. It could be an adventure in a far - away galaxy, or perhaps a story about the heroes it has encountered.
There are numerous candidates for who r2d2 could be telling the story to. It might be to a curious alien species that has never heard of the events r2d2 has witnessed. Or it could be to a group of technicians who are trying to understand more about the droids' experiences. It could also be that r2d2 is recording the story for future generations, so it's essentially telling the story to whoever will listen in the future.
R2D2 was created by Industrial Automaton. He first appeared in the 'Star Wars' series. He's a small astromech droid known for his resourcefulness and loyalty. He was involved in many important events in the 'Star Wars' universe, often helping the main characters out of tough situations with his various tools and abilities.
In R.D. Blackmore novels, there could be various family names. For example, in 'The Maid of Sker', the family name of the main characters might be important in setting the context of the story. However, 'Lorna Doone' is his most famous work, and as mentioned, the Doone family name is very prominent there.
Definitely. R.I.P.D. is a comic book movie. It takes elements from the comic and presents them visually with its own cinematic style and interpretations.