Hi gulla, welcome to chess.com
http://support.chess.com/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=683&nav=0,81 has the answer to your question regarding time-outs. Basically, time-outs are when, in an online (correspondence) chess game, you don't make the move fast enough. Your time-out ratio is the percentage of games that you have timed out in out of all the games you finished. So, since you have finished 14 games and timed out in 2, you only need to finish one more game until you can join the tournament.
Sorry, but why when i try to register me to a tournament, it says "You must have a timeout ratio lower than 10% to play in this tournament.? and exactly what is a time ratio? Thank for the answers