System initialization on Mac/Lion...

Is it in any way possible to open or see the initialising system file (like the sys.ini on a Windows machine, with hundreds of lines of system commands to be executed on startup)? That would add a tad to my understanding of the Apple Innards... What I found, is Home/Library/System/System Configuration with lots of files. I just want to see where Terminal commands regarding folder paths and the like are being stored... And see if it is possible to edit these files or lines directly, circumnavigating Terminal...

As etresoft has alluded to, it's not that you can't see the Mac OS X initialization file; it's that there is no such thing.
Windows is a monolithic kernel pretending to be a micro-kernel; it can use a single initialization file for most of its boot configuration because almost all of the core Windows OS is in a single (kernel) address space.
OS X, on the other hand, is a hybrid kernel composed of the Mach micro-kernel, parts of Free-BSD and Apple proprietary code like I/O Kit - and almost everything runs in userland.  The boot process is similarly a cherry-picked mixture of Mach, BSD-Unix, System-V Unix and Apple-developed processes.
Therefore, one of the effects is that almost every service, daemon, agent, helper and application is independently configured; that's the way the system has been designed.
You could start playing around by opening a terminal and typing "man defaults" to learn about the OS X defaults system...but make sure you have at least one known good backup of your system before you start playing - because you'll probably hose your system.

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