coax jack

So after getting a JVC LT-40CA790 with freeviewplay built in I would like to not have to use the freesat box and use the tv alone to watch channels. The problem im having is that the freesat box uses two cables from the satellite and the tv only has one input that needs an RF coaxial cable which...

I've moved to a 3-story house recently. I put my computer on the 3rd floor, the modem is on the 1st floor. I found one coax jack on a wall on the 3rd floor, how can I use it to get wired internet for my computer? Is it possible? Thanks for your help!!!