I'm sorry, Francisco. All this TFT stuff takes time to setup. I myself am really good with electronics and hardware and it takes me a couple of days to figure out how to make each TFT screen work correctly.
Research the TFT screen you have. Read kevin's link to a driver which might work for your screen. Learn how Linux works, how configuring these things work. I know, it's not easy. But after you learn these things then you will really know your printer.
There is a script in the ~/scripts folder which installs the Desktop environment. It's called install-desktop. If you want the Raspberry Pi to have the entire graphical desktop environment then you'd need to install it.