Installing mediabox

sudo apt-get update --fix-missing
sudo apt-get update
sudo apt-get kodi

Note: GPU RAM has to be extended to 128 (https://rpi.vypni.net/omxcore-failed-to-init-on-raspberry-pi-raspbian/)

wget -q -O - https://apt.mopidy.com/mopidy.gpg | sudo apt-key add -
sudo wget -q -O /etc/apt/sources.list.d/mopidy.list https://apt.mopidy.com/jessie.list
sudo apt-get update
sudo apt-get install mopidy
sudo apt-get install mopidy-spotify

force 3.5 jack audio

sudo amixer cset numid=3 1

Autostart KODI

sudo adduser --disabled-password --disabled-login --gecos "" kodi && sudo usermod -a -G cdrom,audio,video,plugdev,netdev,users,dialout,dip,input kodi
sudo apt-get install -y lightdm
sudo nano /etc/lightdm/lightdm.conf

put there:

[Seat:*] autologin-user=kodi autologin-session=kodi