Therefore, if the friends who want to be interested accept this as help, not a business agreement, and support me, I do not want to give an exact figure, but I will donate a minimum of 1 BTC as it will help me and help me hold on to life again in difficult times.
I doubt anyone would be interested with your offer since they afraid you might not donate anything after they give you the password.
I would like to give clues about the old wallet and the 12-year-old password, but this is not possible.
People are simply asking what's your problem as the whole "hash" thing is ambiguous
I believe OP refer to hash extracted from wallet.dat. That way, you can attempt brute-force without risking your wallet.dat file exposed (e.g. if you use online device or cloud server).