in game of Texas Holdem

i got two Aces as starting hand, what are chances of there being another Ace on one of the 5 cards on table? what are chances of two Aces on the 5card?

1. So my question is; when u have pair as start. What are chances of you getting "3 of a kind" and "four of a kind"?

IN SIMPLE NON POKER TERMS: in a bunch of 52 cards of 4 different colors, each color consisting 1 through 13 numbered cards. the cards are shuffled well. u pick the top 2 cards and u see its a red-8 and a green-8. What are chances of getting another 8th card on the 5 next top cards. And what chances of getting both blue-8 and yelow-8 on that next 5 cards.

2. Unlike commonsense, I believe starting hand of 10 J is slightly better than K A, since u can make straights on both sides (if there are 5+ players). Am i right? who can calculate it? please