Idk what to do...

I'm at my Witts end... I have the MOST disrespectful father I've ever seen.... I have a daughter coming in February... I have told him repeatedly if he wants anything to do with her he has ALOT of changing to do.... No smoking around her or where she will be ESP if house is in my name, I don't want any name calling fussing and fighting around her which he LOVES to do... Things like that and his response is "I'm not changing the way I am" he talks down to my mom whose not only disabled but does everything n gives him everything and all he does in turn is disrespect her... She gets called a retard, fat, ugly, bitch, slut, whore, everything he can come up with and it kills me inside... Like right now typing this my heart breaks for her bc that's all she's ever known from the two guys she's been with... I feel so bad and have so much guilt... I guess bc she's my mom n she gets hurt all the time n does nothing about it... She never gets to keep any money to do anything for herself or keep it.., if she buys something for herself she eventually has to take it back bc he "needs" cigarettes... Or sodas... I want the world for my mom but I can't make her do better for herself :'( she got a ticket one time for not having tags and insurance just to take us out to eat so we had food and yet the argument tonight is (I'm not paying your insurance for the car, your fine, and the electricity bc I'll have to go without cigarettes!) And has called her multiple names and screamed... Idk what I'm gonna do... I either tell my mom I'm leaving n move out on my own somehow n that she can come with me or stay put to help her bc he won't... I'm just so heartbroken right now... I'm stuck no matter what.... She deserves so much better... We both do... I am currently jobless and have been actively searching but until I can find something I have to depend on them to get my daughter and I the things we need... How's it gonna go down when it's cigarettes or diapers??? :'(