PokerTracker

I want to run NLHE and Omaha with PT3 same time - do I need to buy a new code or something or will PT3 just run it all?

I have the latest beat v3.07.1 PT3

They are part of the same application and if you haven't used omaha yet then you can enable the trial via the Help > Register menu (IIRC).
To continue to use the omaha module after that then you need to purchase the add-on. See the omaha purchase page.