Do you also have a full size Pi ?

From a clean Raspbian image basically do this :

sudo apt-get install kodi -y

sudo addgroup --system input

sudo usermod -a -G audio,video,input,dialout,plugdev,tty kodi

sudo nano /etc/udev/rules.d/99-input.rules

-Create some permissions for the input group. Add the lines :

SUBSYSTEM=="input", GROUP="input", MODE="0660"
KERNEL=="tty[0-9]*", GROUP="tty", MODE="0660"

-Open the Kodi default configuration

sudo nano /etc/default/kodi

-Enable Kodi to boot on startup by changing ENABLED to 1

Set this to 1 to enable startup

ENABLED=1

-Enable GPU memory, 128 MB should play back HD video

sudo nano /boot/config.txt

gpu_mem=128

-Update Kodi

sudo apt-get update && sudo apt-get upgrade -y