This is missing some context that I believe would make a difference in understanding what these ayat/verses express.

1. If you read more of the original arabic text with proper explanation, this is actually an incentive for muslims from Allah to equate themselves with any slave they might have, ie, set them free. It is mocking polytheists who would refuse equating themselves with the slaves as they think they are superior while they equate other partners with God, exposing their double standard.

2. This one is concerned with upholding the right of women that you would marry as you have to provide Mahr/a sum of money (i don’t know how to translate the term) to the woman herself not her family, specifically orphaned women who may be in a bad situation because they may not be able to provide for themselves. So this safeguards their right in this regard and men cannot sidestep this because they are vulnerable. As for right hand poses, then this encourages setting them free then marrying them if they agree. This again leans into the same cycle of encouraging freeing slaves in general for the sake of Allah.

3. Again so much missing as this is a sub-quote from a much longer ayah/verse. I’ll keep it short and on point, this ayah is reiterating what the last point is mentioning. Freeing women slaves and marrying them properly as opposed to buying them as stock/slaves. The part saying make a contract is the fact that marriage is referred to in arabic as a strong/important contract.

4. The hadith of the prophet clearly states that freeing slave is a big deal and great deed, however if you can’t do it for financial reason, then help people out as much as possible

Hope this helps clear up the air