ONLY PRO'S ANSWER, PLEASE.

Ok, so I am going to be a movie director/scriptwriter and I was just wondering. I am only in grade 10 right now, I have started making a story for my 1st low budget movie that I would make, today I made the characters for it, and I will start writing a script soon.

But what I want to know is if I want to make a reference to another movie, for example like a little send-up, how do I get the permission to do so? Do I just call the person responsible for it and ask if it is ok?

And also, how much does a camera cost?

Thank you for anyone who answers.

Please no Immature Teenagers. Thank you.