Can I control my files on iCloud on a new laptop?

I have an iPhone 4 and I always backup my files on iCloud.
Due to lack of memory, I backup my photos then delete them on camera roll.
I don't have any other Apple device other than my iPhone but I will be having a Macbook Pro soon.
I was wondering, could I find my backed up files on my (future) Macbook once I connect my iCloud account?
And could I also find my deleted iPhone files on iCloud?

Yes should be no problem…