Conversation so far:
What was a new hope?
Introduced in the 1977 film Star Wars (later dubbed Episode IV - A New Hope), the character represents the hero archetype of "the young man, called to adventure.
Was Luke in this production?
Luke Skywalker lives on a moisture farm on Tatooine with his Uncle Owen and Aunt Beru.
Does he have any children in the film?
CANNOTANSWER.
Is this a sequel to episode 3?
later dubbed Episode IV.
How many were they planning on making at this time?
CANNOTANSWER.
What else can you tell me about episode 4?
Luke takes his first steps toward his destiny when he purchases the droids C-3PO and R2-D2.

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