Hi,
I'm glad to help a fellow newbie on something like this, considering I'm a newbie myself

(I don't post here often).
First off, I reccommend you use RPG Maker XP for this game. Judging from your previous posts, I can see that you know little about actual programming, so RPG Maker might be easier for you to use given it is event based and simplistic. You can buy it for $30 as a digital download off the official site. It runs on my Windows 2000 PC just fine, so I assume it will work for you on your not-100% Windows 7 computer.
I do reccommend that you make the game in an 8-bit style, because it would be easier to do than a 16-bit RPG. You could use MS-Paint for the graphics. Given that your story revolves around a get-and-retrieve-item system, it should take little effort to get it working. I would strongly recommend making the game similar to the Dragon Warrior/Quest games on the NES, and have bosses guarding the Crystals.
For the music, you can use FamiTracker, which is GPL and simple to use. It can do the 8-bit NES music, and 16-bit expansion chip music.
I'll tell you, however, that if you
truly want this game to happen, then you
will have to do most of the work yourself. Many people here are probably willing to help you out a little, but in the end you probably would have done most of the work yourself anyways.
If you want, I can provide you with some of the measurements within MS-Paint for RPG Maker sprites and tile sizes. I myself just started using the RPG Maker for a Yume Nikki-related project, and it took no time at all for me to get development started. For my game in particular, it is taking a long time (months) to make, but judging by your story plot, I could see your game take anywhere from 4 to 6 months to make. I am willing to help play-test the game when it becomes near-complete.
I hope this helps

!