Hi konkreetgurl and welcome. It's nice that you have made friends and are interested in what he/she believes. There is a lot of information about JWs online. I will try to be brief...and give you a little bit. I had to look up what an evangelical free Christian church believes before I could try and compare them to JWs.
JWs do not believe that a person is saved through faith...works play a big part in their salvation.
JWs do not believe Jesus died on a cross...but, a "stake"
JWs believe that only 144,000 are born of the Holy Spirit, and thus become children of God. (Anointed, Heavenly Hope)
JWs believe that there is a second class of people who will be saved but to live here on earth, not heaven. These are called the "Great Crowd of Other Sheep"
JWs believe that the Lord's Supper is the only ordinance to be observed by them.
evangelical free Christian church believes:
That Jesus Christ is the Lord and Head of the Church, and that every local church has the right under Christ to decide and govern its own affairs. [1 Corinthians 3:11; 1 Timothy 3]
JWs believe that a group of men in New York (who are part of the remaining ones of the 144,000 who go to heaven) are the only ones who have the right to make all the decisions for JWs worldwide. They are called the "Faithful and Discreet Slave" A JW cannot doubt or question these decisions or they will be Disfellowshipped (Kicked out, Excommunicated, Shunned by Family and Friends)
JWs do not believe in a fiery Hell. But, consider Hell not a place of torment but merely the grave.
JWs do not believe in the Trinity. They believe there is only One God and His name is Jehovah. His Son is "a" god, not "the" god. The holy spirit is a force not a person.
JWs do not believe in the immortality of the soul. They believe when you die you merely cease to exist until you are called in the resurrection. They believe that the 144,000 will be resurrected to heaven as soon as they die...but, the "Other Sheep" will have to wait until after Armageddon.
JWs believe that God will destroy all the wicked on earth (99.9% of earth's population who are not JWs) and that only the "righteous" will survive.
JWs believe that you have to be baptized as a JW to survive Armageddon (be saved).
JWs believe that Satan is a real being who is controlling the earth and the political governments now.
JWs do not tolerate abortion, believe in reincarnation, the rapture, speaking in tongues, idols, purgatory.
JWs do not celebrate Birthdays, Christmas, Easter, Halloween, July 4th, Valentine's Day....etc.
JWs do not vote.
JWs do not accept blood transfusions.
JWs do not salute the flag.
JWs are supposed to marry only other JWs.
JWs cannot smoke, get drunk, gamble, celebrate holidays, vote, salute the flag, take blood, have sex outside of marriage, believe or think differently than the men in New York or they will get Disfellowshipped (Kicked out, Excommunicated, Shunned by family and friends)
I know there is a lot more...but, that will get you started.
You can also visit http://www.freeminds.org/
Hope this helps.
wick