From WWF.com
Edge, who is Christian's brother and a leading light in the Federation, is one of the most mysterious superstars in the World Wrestling Federation. He often enters the ring from the crowd, thrilling the fans around him.

He seems to be in a constant rage, battling forces from within. He has been known to lash out at the opposition with ferocity, and finish them off with a move he calls the Downward Spiral.

Edge came into the WWF in 1998. Instantly he amassed a number of fans, (mostly girls) 

Edge is played by Adam Copeland Who is from OrangeVille which is outside of Toronto Canada his birthday if October 30th. Before WWF Adam has wrestled as, Adam Impact, Sexton HardCastle, and Adam Copeland he has been part of the tag teams, Suicide Blondes, and Sex and Violence (what a great name for a team!) He Trained at Suly's Gym, He won his training as part of a Contest. From an interview I heard on the LAW (Live Audio Wrestling)

Adam went to Humber College for Radio broadcast so that he would have something to fall back on.

Edge said that he met Christian when he was in fifth grade.
"He had just moved from a little town called Grenville and he was the new kid. So, everyone was always like, "What's up with the new kid?" Eventually he and I talked , and he was the only kind in school who had a ninjia throwing star. And I thought it was the coolest thing going! It was on of those things you would always see in the kung fu magazines, but I had never actually seen a  ninjia star. So, after school we decided we would try and throw the ninga star- and we were throwing it in the trees and stuff. We made a deal that I was going to buy it off him, but it never panned out. That was the beginning of our friendship right there.

Christian

Height: 5’10"
Weight: 215 pounds
Career Highlights: Light Heavyweight Champion

From WWF.com
Christian is an impressive young athlete. This Gothic Warrior is fearless in the ring, and often risks his own health in order to execute maneuvers.

Christian came to the Federation as Gangrel’s protégé. It was later learned that Christian was in fact Edge’s brother. The three Gothic Warriors had a brief but stormy history until they finally united as the Brood.

This former Light Heavyweight Champion may be light in poundage, but makes up for it in his fearless ring style. He is destined to lead the Federation into the next millennium.

Edge and Christian used to wrestle in the "side yard" as kids, and would dream about growing up to the be the Tag Team Champions some day. Eventually Edge had gone through his wrestling training for about a year he started bugging Christian to join him. They were living together with a bunch of people who went to college with them. Christian  signed up and  they started wrestling together and started touring.

Edge says that he didn't "get Christian into the WWF" To a certain extent he helped but he holds that "If I opened the door a crack, he kicked it open for himself." 

The brood Had a short running in the Ministry. Their treatment by the evil empire was horrendous and came to peak when Taker singled out Christian. The Brood refusing to sacrifice it's own member left the Ministry.

Gangrel became angry at Edge, and basically drummed him out of the Brood. Christian revolted and joined his brother. Now they are a major tag team force in the WWF.