I don't know, I can't imagine Star Swirl the Bearded walking around in my room. I'd probably greet him and show him the wonders of modern civilization. Also I'd ask for magic lessons.
No offense, everypony, but HTML and CSS (and a few others of those montioned) are not programming languages. HTML, the most popular one in this thread, is a Markup language, as the name suggests.
Anyhow,
I started with C, moved to C++ (I've forgotten both)I messed around with java for a few days, but left it, and now work mainly in Python.