Funnily enough, I've just started my campaign.
I to have ran the Time Lord system, but this time I wanted a system close to Call of Cthulhu for familiartity to me and the players, who've all played CoC for nearly 30 years.
My party has one Timelord, a creation of the Celestial Toymaker ( a harlequin ), a Sontaran captive, and a Ronin. This is quite a mix, but seems to work well.
Their TARDIS is a "fixer" used by the Lungbarrow University on Gallifrey to educate young Timelords in TARDIS systems, use etc. It's working state is unknown to the players as components etc were in a state of semi repair / construction, all of which add to the flavour.
I ran "Time Trap", from Earth Bound Timelords (thanks guys), scenario as a starter, which has Daleks in it. I've not fully stat'ed any cannon enemies yet, but will do and post them on the forum in due course.
In my mind, the bench mark are the Daleks for toughness, combat damage etc, with everything else coming below that .
My main campaign is modelled on the story "Grass" by Sheri Tepper, with the odd "whoish" tweak here and there. Further stories are based on a number of Dr Who novells I've read for inspiration recently.