If you already have a co-ax cable from where your Tivo is, to where the second TV is then the easiest way of doing it is with.......
One of these:-
http://www.amazon.co.uk/Mercury-Univ...f=pd_rhf_shvl1
and then - either one of these:-
http://www.amazon.co.uk/PowerMid-XL-...=electronics&i...
OR
One of these:-
http://www.thedigiboxshop.com/combin...r-psu-inc.html
The Powermid is easier to set up than the TV LinkPlus, but the LinkPlus benefits form the fact that the whole system is wired and does not rely on wireless communications (which can vary in reliability from house to house) in any way.
I actually have 2 Tivo boxes, and connect 1 to a remote TV with the Powermind, and the second Tivo to 2 further remote TV's using the LinkPlus, so can confirm that both methods definitly work.
One thing to consider, if you have, or are going to have more than 1 Tiivo Box that you want to connect to a second TV, you will have to use the TVLink for AT LEAST one of the set ups, as you can not have two seperate / independant Powmids within range of each other.
Hope this helps
Tony
Edit - If you are only interested in getting the picture to a second TV, you only need the 1st bit of kit. The second piece of equipment is to allow you to change chanel on the Tivo box from a remote control at the second TV - sorry if that wasnt obvious form the above