You will find TONS of information regarding all your questions using the search function, as almost every new member asks the same questions about "starting business" and marketing the "secret super crazy never seen before" lures.
I don't want to offend you, but reading your posts and about the problems you had, you are far far away from "getting into the business"! It just takes a little more, than just a fiew days... also because i am sure you want to go the "quality route". Quality needs time, experience and practice!
But to help you at least a little...
1. How to start:
create your lure, build a mold (maybe multi cav.) or buy a mold you like
buy your softplastic in 5 gal, get into production, sell your product to your friends
2. What gets patented:
Nothing!
(use the search function and you soon will know why. there is plenty of valuable information about it)
3. About the aluminium mold:
Buy the mold you want, pour your lures, name them, sell them.