startx worked! emulationstation worked! thank you...now working on Kodi getting a black screen on exit\

I installed Raspbian Jessie via NOOBS, I did a clean install i set up keyboard and did the ctrl alt and backspace, I change the boot to CLI i add my user name and password and that works but "start x" does nothing(gives -bash: start: command not found) but if I type "X" alone it goes to a black scre...

But I want both Raspbian and Retropie together

I kinda of the same problem but mine keeps booting back into Raspbian I am not getting anything for retropie