Greetings Cazoz!
The Sil mentions that, "By the starlit mere of Cuiviénen, Water of Awakening, they rose from the sleep of Ilúvatar; and while they dwelt yet silent by Cuiviénen their eyes beheld first of all the things the stars of heaven."
Though I have no quotes to support it, I have always taken for granted that the Eldar awoke fully grown. The Sil also mentions that, "they began to make speech and to give names to all things that they perceived." The Elves most likely taught themselves all that they needed to know, including their language and food. And lastly, the Valar summoned the Quendi to Valinor and they were led by Oromë toward the Sea.
That is how I understand it for the Elves; the Dwarves were created a tad differently [img]smilies/smile.gif[/img]
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