I'm a bit confused.
The socket in your old house would have been connected, by coaxial cable, to an aerial (which was probably on the roof but might have been in the attic).
If your new home has got an aerial on the roof (or in the attic) with a lead feeding into your living room (or wherever else your TV is) then re-routing the cable via a wall socket won't improve the signal. (You could try a signal amplifier but it's usually best to get a better aerial).
If you've not got an aerial at all then, obviously, you need to get one fitted. Unless you've got access to ladders (and are happy working at heights) this isn't really a DIY job.
Whether you've already got an aerial or simply need to upgrade it, you'll probably be best advised to seek the services of a prodessional. Look under 'Aerial services & supplies' in Yellow Pages.
Chris