Computer Programming questions.?

[infamousairman]

I am an absolute beginner at programming. Have no clue at what I am doing. But I have several ideas for creating apps and websites but I have no idea how to code. I know that there are tons of options like C++, Java, PHP, HTML5, and Python. I have no idea what to learn first. What is the difference between all of them? What type of language are sites like paypal, spotify, facebook etc. using?

Also, even when I learn the programming, where do I begin? I know I need to use xcode for developing apps but where do I start off on developing websites? Any tips for an aspiring entrepreneur ?