You're going to put 1 what in one tank and 1 what in another tank? You mean the male (future father) and female (future mother) in your different tanks?
And the babies fighting as they got older is one of the least problematic parts of breeding bettas.
You will need:
A tank to condition both female and male in seperate from any other fish and seperate from eachother.
You will then need somewhere for the actual spawning to take place. This could be the males conditioning tank if it was big enough.
You will then need somewhere to put the female for a couple of weeks to recover (on her own without other fish)
You need a grow out tank for the fry until they are big enough to sell.
You may also need seperate containers for each of the young fish once they are big enough and do start fighting.
You'll need all the foods neccesary to raise the fry aswell
Also you'll need to do A HELL of alot of reasearch before even thinking about breeding.
Not trying to put you off. But you don't seem to be far enough it your 'research' to even be thinking about the fry fighting once they're into the adolescent stage.
I'm sure modaz and netty etc will improve on my reply. But it's just something to get you thinking.