>The third part was basically could Gandalf have made a ring for himself, just as Sauron did, in order to act as a counter to te One? His ring being fashioned after the elvish rings (the 3) so as to do good and not harm.

This question is a little more complicated than it appears. The forging of the rings of power was a mistake. The Elves forged the Three hoping to use them to hold back time and decay, rather than accept that the things around them faded and died, while they remained unchanged. So they tried to circumvent the way of the world, and their attempt to be free of pain and death became the cause of much more when those rings became a danger to them. Could Gandalf have made his own ring? Possibly....Saruman tried it. How sucessful he was, we don't know. But the very fact that he tried was evidence that he had fallen from his mission. The Istari were sent with instructions not to use power to indimidate or lead the Free Peoples of Middle-earth. They were to encourage, to lead by example, and to help.

Gandalf was given one of the Three to help him in his quest, but I think he used it sparingly, and in accordance with his mission. The only purpose he would have had in making his own would be to gather more power or influence, which would have gone outside his instructions.

And the final consideration is that if he made his ring on the model of the Elven rings, how could he be sure the One could not control it as well? All the other rings were bound by it.

>Do u happen to know the conditions that were made for the Istar to go to middle -earth and save all the free people?

Are you wondering why they were sent, or what they were and were not allowed to do when they came to Middle earth?

At any rate, all the information you want can be found in The Silmarillion, in "Of the Rings of Power and the Third Age", and I think there is more about the Istari in Unfinished Tales.

Silverlode

"They looked as he pointed, and before them they could see the stream leaping down to the trough of the valley, and then running on and away into the lower lands, until it was lost in a golden haze."