Hi T. -
I feel your pain! We just got our son into his toddler bed a few months ago and I thought I was going to go crazy getting him there.
I wish there was an easy answer. You didn't mention how long you've been trying this, but it took us a good month to get the sleep routine back under control. (and some nights we still struggle) We put his crib back up, and when he wouldn't stay in his bed, after a time he ended up in his crib, which he hated, so he started to relate the consequence a bit. But we also found out that if we just sat up and rocked him forever until he fell asleep, then put him in his bed, he would stay usually through the night. Some nights, we would be rocking until 10:30 at night, but it was still better than the constant running back and forth from his room to the living room, etc. which only woke him up more as it was such a fun game. We let him take toys with him to bed, and slowly but surely he started to stay. He knows he can't come out of his room and some nights he just stands at his door daring us to come and get him. We don't. He gets tired and eventually falls asleep. Sometimes on the floor.
If he gets up in the night, he comes to us in our room and we snuggle for a minute until he's droopy again and then back to bed. We've had good luck with the middle of the night, so I don't have much advice for that. (only that I will be repaid tenfold in the teenage years, I'm sure)
For our son, the "big boy" concept seemed to really work on him. He helps me change the sheets, we "pretend" to go "night night" throughout the day, and we let him choose what animals to have on his bed, etc. He enjoys the freedom of being a big boy and we encourage that as much as possible.
Until your daughter is sleeping consistently in the bed with no issues for at least a month, I would highly suggest you put the crib back up with a safety net, etc. as a way to get your sanity back. She'll cry and cry and it will break your heart, but she'll get it pretty quickly, and you'll be able to get a good night's sleep!
Good luck -
S.