It's a 2.5 day event that includes many presentations on security, typically computer security but there are a few physical security (and lockpicking) talks usually. Toorcon is a small conference, so it is mostly focused around the talks.
There are also various areas like the vendor area, contest area, and lockpicking village. I believe they'll also have an area setup for badge hacking again this year, and probably some sort of video games for people just wanting to relax. There's also some parties at night, good food nearby, and so on.
I think the best way to learn about stuff is to dive in, so if you're interested in computers, programming, hardware hacking, lockpicking, etc this is a good way to immerse yourself. When you leave you have a nice list of interesting topics you can choose to explore. Seeing everyone do cool projects and presentations is also a great motivator.
Anyways, we can chat more about it at the LA meeting in September. The October meeting will technically be held AT toorcon, so you have to show up