Remove spouse's name from title

As you have learned, don't do it yourself. Hire an attorney but don't hire some storefront 'paralegal' here in So Fla who can't even spell correctly

What kinds of support are taxable?

Spousal support is generally considered taxable income while child support is not.

Is there a way I could claim the children on my tax return?

If you have the legal right to claim your children, claim them. The IRS will contact you if they were already claimed by someone else. Best to...

Can we file 1040 jointly living separately?

Yes. As long as you were legally married.

Can I take her to court for this, or is one parental approval enough?

Since there apparently weren't any court orders or judgments from before, you would probably have to go to court to obtain visitation rights. On...

Should I choose the MFS status for filing income tax, during the divorce?

If you file MFJ you will be jointly liable for any misrepresentations. File MFS

You can request child support before the dissolution of marriage is complete. Alimony, may or may not be granted. Hire an attorney to help...

Best to file as married filling jointly

How can i prevent my kids getting taken away from me?

There are many variables here that I don't know so I cant fully evaluate. However, if you are served with a Domestic Violence (or any type of)...

Will he get jail time or probation?

Nobody can tell you for sure what will happen in court, however, for the best possible outcome you should hire an attorney immediately.