Where I can find theme Documentation? How to install and use theme? Do you have some guide?

Detailed Documentation guide provided with every FULL theme ZIP archive ("All files and Documentation" link in your Downloads tab in your Account on Themeforest) in 'Documentation/index.html' file, just open it with your Web Browser and read.

Unpack "All files & Documentation" purchased theme archive before opening documentation (don't open file FROM archive without unpacking or you will not see images).