Conversation so far:
What was Star Wars: Episode IV – A New Hope?
Star Wars (retroactively titled Star Wars: Episode IV – A New Hope) is a 1977 American epic space-opera film written and directed by George Lucas.
Was Luke Skywalker in Star Wars: Episode IV – A New Hope?
In Star Wars: Episode IV – A New Hope, Luke Skywalker lives on a moisture farm on the desert planet of Tatooine with his Uncle Owen and Aunt Beru.
Does Luke Skywalker have any children in the film, Star Wars: Episode IV – A New Hope?
Is the film, Star Wars: Episode IV – A New Hope a sequel to Star Wars: Episode III – Revenge of the Sith?
Star Wars: Episode IV – A New Hope's success led to two critically and commercially successful sequels and later to a prequel trilogy, a sequel trilogy.
How many prequels and sequels was George Lucas planning on making at during Star Wars: Episode IV – A New Hope's release?
According to Mark Hamill,  in 1976, Star Wars creator George Lucas told him that he planned three Star Wars trilogies.
What else can you tell me about Star Wars: Episode IV – A New Hope besides the planned prequels and sequels?
Luke takes his first steps toward his destiny when he purchases the droids C-3PO and R2-D2. While examining R2-D2, he sees a message from Princess Leia Organa.

Question: Why does he need those?
Self-contained rewrite: Why does Luke Skywalker need the droids C-3PO and R2-D2?