Actually, it depends! As I don't own yet a horse, I ride the horses of my stables and I adapt my way of riding to each horse. Some need to be ridden with spurs to help them to better understand our demands for example. I have a pair of little spurs and some whips. But if possible I ride without anything, it disturbs me more than it helps me!
Not really. I prefer to ride without any artifice. Actually I know it depends of the horse. When I was riding in an equestrian center, I had to use a dressage or jumping whip for some horses who needed it. But if it's not necessary, I don't use it as I prefer to ride just with essential equipment :)