Eh, you really didn't think we would go through the trouble of writing a walkthrough, did you?
No, but we'll link you to a good one. Either that, or buy the BradyGames guide for Final Fantasy 7 because god knows they have been having some hard times lately, especially after everyone boycotted their shitrags after finding out they wasted fifteen bucks on a guide telling them how to use PlayOnline.com.
Anyway, here is the FAQ.
Final Fantasy 7 Walkthrough by Josh Harrison