Active Two year Old

We have been back from Russia with our two year old girl for only two months and already she has turned our life upside down (we already expected that but this is much more than expected). She is EXTREMELY active. She doesn't play with toys, isn't interested in TV and throws firts constantly. I feel that she does understand much of what we say because a lot of times when we ask her to do things, she does them. We also have a son who we adopted from Russia when he was only 8 months that was a pretty good baby and I know it is not fair to compare the two. We knew what to expect, but we had no idea that she would be like this. When we throw fits, we have tried everything, ignoring her, loving on her, walking away, scolding her, everything, but nothing seems to work.