B) I need to fix this coin first which will cost a lot.
What exactly are you going to do to fix it?
Do you still think that the problem is somewhere in the code, that an experienced programmer can write some C++ and it will magically turn your shitcoin into a reliable payment method?
Do you think that the problem with it is that it lacks some features that need to be added?
No.
The first problem is premine. In order to solve it, you have to restart the blockchain, so that those worthless premined coins become invalid. And second problem is that your coin lacks innovation. And in order to make it, youll have to make a new coin. You may keep the name though, but it must me a new coin with a new blockchain. Otherwise it will still be worthless.
Unless of course you have some genius plan that you are to modest to share.