Which are the skills a web developer must have in order to apply for jobs?

I'm not sure if this question can be asked here, excuse me if not and I'll apreciate if you can show me where I can.

I'm studiying web development since 2 months more or less. We are learning HTML, CSS, Javascript and we'll be learning PHP in a while. I like the course and I whould like to work as a programmer eventually, the problem is that the course is not official and the diploma we'll get will be kind of worthless. So that, I want to ask you a couple of questions about this:

-Which are the skills a web developer must have in order to start applying for jobs (I'm not talking about specialists, but more in general)?

-What are the companies expecting and valuing the most from an autodidact candidate (In other words, what should a portfolio contain to maximize the chances of being hired)?