Some troops they are...:-P

Is not the troops . Is the money you save in the beginning since you will have to buy troops anyway.

I never buy any of the troops I start with, because there are always better ones available.

Is there a way to keep those 5 paladins from training? Cuz I dismissed all my troops except the paladins and at the finish line they vanish and my dismissed troop are magically back.

You can't keep them, your leadership doesn't allow it.