Unless Apple has changed its philosophy of simplicity, you will never ever find any advanced settings. If there's something specific that you want to do ask your question and we might be able to help, but generally there's not a lot of tweaking that you can do in OS X.
You miss it at first, when you switch from windows, but after a while you overlook the lack of tweaking when you realize that you've had the computer on for months without a reboot and it's still working