You'll need 3 antennas on the roof, 1 each for tv, fm, and dab. They can be multiplexed on the pole and then sent down one cable, or sent down 3 seprate cables to the distribution amp.
The 'loft box' style amp is the best way forward , it will put all three down the coax to the rooms. They usually have a single output which can also have sky LNB feed on it as well, which can be send down a single coax (good quality though) to a special (triplexing) faceplate that extracts all the signals. The RF feed output from Sky and other stuff like VCRs can then be fed back into the distribution amp, so that pictures from the Sky box and the VCR etc, can be seen around the house. They usually come in 4 port of 8 port versions.
As for the telephones, pick up a BT style junction box from CPC (
www.cpc.co.uk) where you can punchdown all the lines from each socket to the incoming BT.
Obviously do 'home-run' wiring from each socket to a central point.
Hope this helps,
Richard