Well.. by now it was a first bad upload and now frontend stuff. Neither has to do with MODX
I can assure you that you'll like it, when you have it running. Do you work on your local machine? If I can help you, just tell me.
Back to start, some basic questions:
1) Do you have a template which contains head, body and [[*content]] somewhere in the body? That is the space where your tree to the left will be parsed into.
2) Did you move your css to assets/css or similar?
3) when you open the source code in the browser (vie source or such), do you see the correct links to css?
4) sometimes, you have to delete the cache by the button from the top menu. try that.
Edit: ah! Good news

Tired people do funny stuff sometimes