What's Faith Got To Do With It?

I've been thinking a lot about faith lately, specifically about what faith brings about...what does it cause to happen? Here are just a few of the verses I pulled up.

Romans 3:21,22
"But now apart from the Law the righteousness of God has been manifested, being witnessed by the Law and the Prophets, even the righteousness of God through faith in Jesus Christ for all those who believe; for there is no distinction;"

Romans 5:1,2
"Therefore, having been justified by faith, we have peace with God through our Lord Jesus Christ, through whom also we have obtained our introduction by faith into this grace in which we stand; and we exult in hope of the glory of God."

Galatians 3:13,14
"Christ redeemed us from the curse of the Law, having become a curse for us--for it is written, "CURSED IS EVERYONE WHO HANGS ON A TREE"-- in order that in Christ Jesus the blessing of Abraham might come to the Gentiles, so that we would receive the promise of the Spirit through faith."

Philippians 3:9
"and may be found in Him, not having a righteousness of my own derived from the Law, but that which is through faith in Christ, the righteousness which comes from God on the basis of faith,"

1 Peter 1:5
"who are protected by the power of God through faith for a salvation ready to be revealed in the last time."

Acts 10:42,43
"And He ordered us to preach to the people, and solemnly to testify that this is the One who has been appointed by God as Judge of the living and the dead. "Of Him all the prophets bear witness that through His name everyone who believes in Him receives forgiveness of sins."

My questions for you are:

1. If I have faith in Christ for eternal life, do I also need to have faith in God for these things (Christ's righteousness, the Spirit, peace with God, protection by God's power, forgiveness of sins) as well in order to receive them?

2. Or are these things included in the term "Eternal Life" and I receive them when I have faith in Christ no matter what?

3.Or are these things that only potential and not realized at the point of faith?

Evangelism

What do you think of when someone says, "evangelism"? Maybe it's somebody passing out tracts, or preaching on a street corner. Maybe you think of giving a "testimony" of your salvation experience to someone else. But the bottom line is that evangelism is telling others the Good News, right? If it's in a tract, or a sermon, or a personal testimony, we're sharing what the Good News means.

So I have two questions for you:

1. What is the Good News that we are sharing?

2. Is there a Biblical command for us to share it?