pottying in the
You need to start from scratch with her and teach her like she's an 8 wk. old pup. Limit her access to the entire house by keeping her in one room like the kitchen with her crate, food and chewies. Take her outside to the exact same spot each time upon waking, after eating, after playing and before bed. Walking her a couple of times a day will stimulate her to go potty and make sure to give her lots of praise and a tiny treat when she obliges. If her previous owner had young children then maybe there wasn't much time spent training this little girl. Ignore all her mistakes but praise all her successes.