Do we not get our morals from the Torah? Isn’t the Torah true and perfect for all times?
ROTFLOL!!! This is a different question that we have gone over ad nauseum many times here in the CR. My short answer to you is no, the Torah is not “Moral”. “Morality” is a human concept.
Point 3 is Halachic. One could not simply kidnap someone and keep him/her as a slave.
Point 4: if you recognize that there are different levels of responsibility, you may (if you are honest) recognize that responsibility comes with power (on each level). Those with a lower level of responsibility for themselves have their own responsibilities towards those with greater responsibility (such as the requirement to redeem a first-born son).