Hi! Wow, you must have your hands full!!! I have a three year old and a 10 month old and I feel like I'm loosing my mind!
With my daughter, I began with just placing the potty in the living room and talking about it...and then taking her with me when I went to the bathroom. I'd also put her on the potty when she was making a "poop face" and let her go. At first she was a little resistant (I think she was scared!), but that didn't last long. We made a HUGE deal about her going. We had a little dance we'd do...and she'd laugh and laugh and laugh. I'd also give her a treat of some kind--a sticker, aome raisins, and, thanks to my mom, m&m's.
We went from that to running around naked. She peed on the floor only a few times. Mostly, she'd go find her potty and go on it. It worked great! The only drawback was that we had a difficult time transitioning to "big girl pants." When I would put them on her, she would pee in them. She would start to pee and then say she had to go. So, her panties would be a little wet. I did a lot of laundry...And, to this day (she's been potty trained for about 18 months), she will still pee in a diaper if she's wearing one. That being said, I would NOT recommend the use of pull ups. My daughter didn't distinguish between the two. Although, I guess they do work for some. Each child is different. And, I guess it's all just trial and error. Good luck!!!
Good luck!