how read code from arduino mini pro

Hello friends I have 2 arduino mini pro 12 v with bluetooth one is new one is old i want replicate old functions to new means I want to read old arduino code with arduino uno if any one known kindly tell me tutorial I am new i will pay 50$ for it help thx
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Theforex123
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As you are willing to pay then this might be better asked in the Gigs and Collaborations section of the forum

If you click the "Report to moderator" link in your original post then one of the mods will move it for you