You can start with any language, really. There are a few basic concepts that are common among most programming languages. What you should stay away from, as a beginner, would be specific language types, like a logic programming language (prolog) or functional (haskel). Not to say you shouldn't learn these, you definitely should some day, when you are comfortable with a more common language.
If your interest is making games, AS3 would be fine to start with. Both AS3 and Javascript come from Ecmascript, so learning AS3 will give you a headstart in Javascript (and vice versa).
Python is a good choice too, fun and elegant.
HTML&CSS aren't really languages at all, so I'd ignore those unless you are interested in web development. And if you are, then I'd start with PHP or C#.
Good languages that will definitely make you robust would be C, C++, or Java. If you want to make Mobile games, Java is a good choice, since that is what you will use in creating Android applications. C (and Objective-C) are what iOS/Iphone apps are made with.