Simulator and test-training data in Automodel

Hello, 
I am using AutoModel. I have some questions : 
1. Is the simulator based on test data, training data or all data ? 
2. How do I ensure that my test dataset is balanced, I have a lot of categorical variables, how do I ensure then the test dataset is balanced ? 
3. Can I see metrics for both training and test error rates ? I think I only see for test. 

Thanks