Depending on load factors, and ground conditions, maybe 45 MPH is possible for a short burst. Moose racing was/Is popular in the U.S.S.R. and Reindeer and Moose are crossed to improve their performance. This was a feature of the un-televised in the US l980 Winter Olympics. 2-Moose sleds were used, very skimpy with one driver.
Twelve to fifteen miles per hour.
Stop too fast? ;)
a blue car
the reindeer makes Santa's sled move by pulling Santa's sled
on a reindeer sled.
Rudolph is a fictional reindeer that helps to pull the sled of Santa Claus. It is said that Rudolph can fly and has a bright red nose that helps Santa navigate in bad climactic conditions.
The reindeer would rather pull the sled than a blue car, or a blue and yellow chariot, or a red wagon, or a blue buggy. (The point is that Marco constantly changes the animal and objects to something more astounding, to make for a better story.)
On his sleigh? Reins. Santa puts reins on his reindeer that are attached to his sleigh. :D
Horses
Reindeer do not really help people, well except for Santa Clause. Reindeer pull Santa's sled as he delivers toys to the good boys and girls. The second part of your question (hrefhttplender-24hcom httplender-24hcoma) can not be answered.
They use them to pull sled through the snow.
Reindeer pull the sleigh that Santa Claus uses to deliver present every Christmas Eve. Their names are Dasher, Dancer, Prancer, Vixen, Comet, Cupid, Donner, Blitzen, and Rudolph. They are all magical reindeer, though, because ordinary ones cannot fly!
Rudolph learnt to fly by going to reindeer school. he had to pull a kids sledge across a Field and then he was sprinkled with special dust. he now flys by getting sprinkled with dust and he has wings on his hooves.