how much space should i get??

hi i'm planning to start my own website.
i've laready found a free domain name, but i don't know how much hosting space i should purchase:confused:
i want to put about 40 youtube movies on it and maybe some pictures and i need mailbox on it so how much space should i need?

You realize youtube hosts all of it's content natively, you imbed it on your website, but it will not actually use any of your storage or bandwidth.