Well, we have all been there. That's why this forum exists, to help people when they run into problems. I disagree however that any of the responses have been irrelevant. Maybe it seems that way to you, but everyone who responded simply was trying to help you. Trying to help someone in need is never a waste of time. It's a process of communication and feedback. I'm pretty sure your problem can be solved. It's just a matter of further clarification of exactly what it is. And your agreeing to try some of our suggestions.
just a quick clarification: I mentioned Linux awhile back. You don't even have to install it. most Linux distros allow "live mode," which means you can just download them to a USB stick, or even a CD, if it's a light enough distro. You would then be able explore the drive and possibly recover data from it.
The way I see it, your problem breaks down into two parts:
1) Getting the drive to boot
2) If the drive won't boot, recovering data from it.
some of the suggestions have dealt with the first option, others with the second. but they are all relevant, just to different options.
Take care and good luck!