sudo apt install kodi kodi-pvr-hts
is a good start.
With my last install of TVHeadEnd I simply set the userid and password to "kodi" for the super user. I didn't bother with a lower privileged user. That may change later if I think the system needs more security.
I'm still not 100% with Kodi (and I've no idea how to get a screen grab).
My latest eBay purchase is a caravan antenna: http://www.ebay.co.uk/itm/132717520325, I'm hoping that will be good enough for my portable DVB TV.