I have 2 kids I diapers and need advice on how to leave my husband. He's toxic to me and my kids. Help!

You tell every family and trusted friend that you are leaving.
If none of them can take you in temporarily, you go to a shelter.
You look in the blue pages for the town social worker.
You consider a restraining order if he hit you or the kids.

I personally don't like the word toxic used regarding relationships. What does it tell me? Nothing.
You and your husband were relating OK not too long ago, because you chose to bring two babies into the world, and they are your combined responsibility for the next 17-18 years.
A counselor is trained to teach couples how to talk to each other. Yes, it's a job.

I would start with checking for local organizations that support abused wives. They can suggest how you proceed.

Please explain "toxic". That could mean anything from abuse to just disagreement.

As Tal said, toxic could mean anything.

Please provide more information.

It is hard to offer advice otherwise.