I know that I can say: I go get us some sodas. No, you can't. I will (I'll) go get us some sodas. I am going to get us some sodas.
But can I say: I go TO get us some sodas? Or is not correct? You need to fix the verb - I'll go. Using "to" is okay, but the "to" fits more for a destination. I'll go to the store to get us some sodas. Otherwise, using the "to" indicates that you are going somewhere to get them. Without the destination, it's better to leave it out.
thanks, bye.