Ok. I do cat rescue so hopefully this will help...
Take the babies inside the garage, and be sure to handle them everyday. Also take momma in, and feed her only kitten chow. When the babies get about 3 weeks, introduce them to a potty pan with NON CLUMPING litter! Clumping turns to cement in their tummies, and causes life threatening illness.
You just keep putting them in it, and moving and digging with their paws and they will catch on quickly.
Once they hit 8 weeks, and eating on their own, they should be ready for adoption! Make sure they are eating solids, which you start introducing at 4 weeks. Either canned food, or moisened kibble.
NOW- Once the babies are adopted, you have a few options.
Decide if you want to keep kitty, or find her a home. If she is friendly, I would probably adopt her to an indoor only home, if you cant keep her.
If you want to keep her, and let her stay outside(which I do not recommend because so many bad things could happen), you MUST get her fixed to keep her from making your house a cat house
She can get pregnant within 4 weeks from having the babies. So keep her in while they are 4-8 weeks, to make sure she does not get pregnant.
I hope this helps, and that you find the babies great homes quickly. If you ever need anything, or have any questions, please feel free to pm me. GOOD LUCK! And thank you for helping these poor homeless babies!