Well I tried that bookmark bar and it's not what I wanted. So I get back to opera 12. Still waiting opera version where you can enable old bookmarks style.
I also found answer for my second question (posting here in case someone else will be looking for this): to move ALL settings (even including current opened pages) all you need is just to copy 2 folders to your new windows installation:
1) C:\Users\Username\AppData\Local\Opera
2) C:\Users\Username\AppData\Roaming\Opera
P.S. This forum is a bit buggy