As we read through the account of The Fall, my wife and I wondered why Eve was not surprised to hear the serpent speak to her. Could other animals in the garden talk as well? 
Good question.  This is a good time to mention that the Bible is not a book of all information, but only one that gives us everything that we need to know to build a relationship with God and obtain salvation.  From Eve's response we can infer that possibly other animals could talk, but we don't know.  We do know that there was a different relationship between the animals and man before the fall.

In chapter 14, verse 13, Abram is called a Hebrew for the first time. Is this significant? What did it mean for him to be called a "Hebrew"?

There a couple of possible answers to this question:

1. My Bible commentary says that this was later used as a disparaging term about a ethnic or social class of people by non-Israelites (see 39:17).  A variation of the term in non Biblical writings refers to a property-less, dependent immigrant, so it may have been a way of describing Abrams immigrant status in the territory.

2. Another is that the word originated from the name of of Shem's grandson Eber 10:21 who it is thought became a significant figure in non-Biblical Israeli history. 

I would welcome any other comments on this question

Jacob favored Esau and Rebecca favored Jacob which is not good..mother and son conspired against husband..father..so was the punishment that Jacob leave his home?Esau sold his birthright..is that why Jacob was favored by God and not Esau?
Another good questions.  I think that it's good to remember that just like David said that God knew him in his mother's womb, God knew Esau's heart as well, and he knew all of the trouble that Esau's disobedience of his parents in marrying outside of his own people would cause not just then, but even today!  However, even with that said I don't believe that the statement God hated Esau meant he was condemned before he was born.  Esau's eternal destination is not spelled out in the Bible, but whatever it is, he is there by his own free will.

I am learning moment by moment, day by day. I recommend 

http://www.spurgeon.org/sermons/0239.php 

for some insight into this passage about Jacob and Esau. May GOD have all the glory.

Why is it back then they lived to be very old? Also who were childless use their slave servants to bare the children? Wouldn't that be call adutries? Just had always wondered that.

The life expectancies were longer back then I believe, because they lived a simple life, with lots of exercise and simpler food and they had a healther environment.  As for using their maids to have babies, I am not saying this was right, but in that society if your slave had a baby it belonged to you, so if a woman was unable to have a baby she could have one through a slave.