My horse is a 17 yr. Old rescue, and she is the most willing and obedient horse I could ask for. I am beginning to train her under saddle this summer. The organization that I adopted her from told me that she was green-broke at one time, but they didn't know the details. That said, I believe it is best to play it safe and work from the ground up. Thus far, she is making my life easy...on the ground, at least.
A very good friend of mine (who also happens to be an experienced trainer) told me that she starts riding all of her horses with a halter & clip-on reins. Since the bit is a foreign object that takes a lot of getting used to, she thinks it is better to introduce that later. Her word is like gold to me, but I also would love to hear what you all have to say... So, Halter & Clip-on reins OR Bit & Bridle for a newbie horse?