Why can't I see my kids

Not enough facts here to answer this question.

Best for your husband to go talk to an attorney to get some help with this. A short consultation will not be expensive.

The remarriage waiting period would be per the state where you want to get married. Check with Nevada. The waiting period actually protects you...

Would I be able to get physical custody?

Looks like you are in Texas and the kids are in Alabama. You'll need an AL attorney to deal with this.

If he should die before he signs papers, will the property go to his kids or me?? What needs to be drawn up ?

At this point, with no marriage you would not get any of his separate property. He could get a will drafted and make you a joint survivor on...

Would the minor be responsible for the offsprings welfare in anyway if he does not want to?

The law will require that the male take responsibility of the offspring by payment of child support, medical insurance, and other nominal expenses.

What could I do even though I reluctantly signed the papers at mediation and the Judge has now signed the new judgment

Sorry but this is not the mediator's fault. You really should have hired an attorney to help. You might want to hurry over to an attorney's...

How do I divorce a spouse that I have had no contact with for 24 years and am unaware of his whereabouts?

Hire an attorney to get this to move along quickly. You should know that all of your assets are still community property, subject to division.

If I get a secondary job to supplement my income, can that be used against me in the future to possibly increase child support?

You can be held accountable for your normal level of employment. If you elect to get some extra work there is a good argument that you cannot be...

Is this legal? By collector or my employer?

Sounds like you signed something giving them permission to contact you.