All eleven incarnations of the Doctor, 5" tall (varying slightly according to the actors' height), each with either a sonic screwdriver or other personal item except for the Sixth Doctor, and in his case it's probably the coat. The First Doctor has a walking stick, the Second has a recorder, the Seventh has an umbrella.
The First and Second Doctors are wearing their costumes from The Three Doctors, the Third is wearing the green jacket with the brown cape, the Fourth is wearing the costume from the City of Death era complete with hat and scarf, the Sixth is wearing the Terror of the Vervoids costume, the Seventh is wearing his brown jacket with no hat, the Tenth has the blue suit with trenchcoat and glasses. The Fifth, Eighth, Ninth and Eleventh Doctors are all wearing their usual costumes.
A few minor niggles: the Fifth Doctor's sonic screwdriver and the Seventh's umbrella don't stay in their hands too well (at all, actually) so break out the blutac before getting them out of the box. The Eighth Doctor's hair is the wrong colour, almost black, although it looks fine in the photo, and he doesn't stand up too well unless you get his legs exactly right as one is minutely shorter than the other.
That said, this is a pretty fantabulous collection; wrong hair or not, it's great to be able to get the Eighth Doctor (one of my absolute favourites), and I understand this is the only place where he's available. The set has fun little quirks like the Fourth Doctor's scarf trailing on the floor, actually providing the figure with additional support. The figures are all pretty good detail for the size and seem to capture a little of the character. This set is good value for money, working out at less than £5 per figure - imagine how much it would cost to buy them individually!
Now, Character Options, pay attention: good job, but don't stop there. There are still loads of classic-series companions and villains to release yet!