How can I re-download all the apps I bought on another store account?
Check my story:

Do I need to repurchase apps if I moved countries?

In short - you can't. You have to stick to your old account for updates of the software you bought and create a new AppleID for purchases in new country.

Unless of course you are willing to pay for all applications (and in-app purchases) again. Then there's no need to have another AppleID, you just switch store country, but there's no automation for re-buying them unfortunately.