Vocaloids can't dance. If you're talking about dancing exactly like in MMD, you certainly can't do everything they can, but the movements are kinda jerky and whatever. You should be able to do most of the things from Project Diva, but I don't recommend running up stairs as fast as Miku did in Rolling Girl because you will kill yourself.
Youtube "Miku miku dance"
Vocaloid fans like Vocaloid. Vocaloid fans are located around the world. Vocaloid fans also have a tendency to like Japanese animation (anime) and comics (manga).
There is no VOCALOID video game, unless you're referring to MMD (Miku Miku Dance), which is completely free on VPVP.
No Teto is not a Vocaloid. I have heard before that She was made to be a prank. She is mistaken to be a Vocaloid. She sounds like a Vocaloid(y) software.
yes but it is difficult
Miku Miku Dance software and Vocaloid products are not dependent on each other in any way. You do not need one to use the other.
so far there is no vocaloid anime nor do they have plans to make one...it would be like a Japanese glee except vocaloid would actually be good!
You install a Vocaloid like any other piece of software. Price varies depending on the Vocaloid but can be as much as $200. You have to pay for Vocaloid, unless you illegally download it. However there is a program called UTAU that is similar to vocaloid and lets you create your own UTAUloid rather then just the one voice
Yes, Ai is a vocaloid. A vocaloid 3 to be exact.
it might because MMD stands for miku miku dance but i cant be totally sure
Like a Vocaloid, but for erotic sounds.
If you're talking about the Japanese vocaloid then you can't. But there are several ways to change vocaloid into English once you have it. Like in this video for example: http://www.youtube.com/watch?v=D01vaheD-Oc