This question might be more appropriately posted in the "Discussion" section.
The stories are way too long to tell in a short post. I will give you a sliver of a thumbnail sketch. (more like nail clippings than a true thumbnail)
Abram (Abraham) is the patriarch of the Jewish people. In principle, all Jews are descended from him. Well, at least spiritually if not in terms of actual lineage. He led his people (not yet called Hebrews or Jews) to Canaan. God promises to make Abraham the father of a great people.
http://en.wikipedia.org/wiki/Abraham
Isaac was the son of Abraham. Because Abraham's wife Sarai (Sarah) could not bear a child, she told him to have a child by Hagar, her Egyptian slave. Hagar's bears Abraham a son named Ishmael. However, when Abram is 91 years old and Sarai is equally old, she bears him a son who they name Isaac.
Eventually, Sarai tells Abraham to expel Hagar and Ishmael who go out into the desert to die but Ishmael survives and the Arab people claim him as their forefather.
Isaac is most famous because Abraham received a vision in his sleep in which God told him to take Isaac (Abraham's only son, well not counting Ishmael) and go up on a mountain and make a sacrifice. Obediently, Abraham climbed the mountain with Isaac but, when he was about to slay Isaac, God stopped Abraham and conveniently provided a ram to be sacrificed in Isaac's stead.
Moral: Be careful what you drink before going to bed and always keep a spare ram around, just in case.
http://en.wikipedia.org/wiki/Isaac