Considering Carrara for any animations other than bouncing balls and yo-yo thingies is a risky proposal. To do near-professional animations on the cheap and on the quick you use IClone.

Here are 4 very clips done with IClone 7.2. See this link, and this link, and this link, and this link.

IClone 7.2 is fairly new, so the artists who use it are still learning its impressive new features. But as time goes by there will be more and more very movies made with IClone and, with the upcoming IClone plugin for IRay, some of these very movies could well be near-broadcast quality.