Is faith in Jesus of Nazareth all it takes to get to Heaven?
Depends on your faith. Jews don't so much believe in Yeshua being the Messiah, but they still acknowledge Him as a great rabbi.
Can everyone who believes that Jesus' death on the cross paid in full the price for their own sins go to heaven?
No. That alone will not get you in.
Can Mormons who believe in Jesus get to heaven?
Probably not. Not only did they write another bible, but they worship Moroni more than they do Yeshua.
How about Jehovah's Witnesses? If they
believe does it matter where they go to church?
See above. JW's have a lot of strange beliefs, most are of a cult variety.
I've heard that JW's and Mormons aren't real Christians...

Is that true?
No, they're more like a cult.
I was told by a preacher that unless a person belonged to The Church of Christ, it didn't matter what they believed... NO HEAVEN! He said the Bible is clear in that regard.
See....here's where a LOT of people get it wrong. It's not so much that there is only 1 religion, I mean.....look around, and, many of them have very strong similarities. I would advise being wary of any religion that touts themselves as the "only way". I like what the His Holiness the Dali Lama said when asked how many religions he thought should be. He replied that there was 6 billion people on this planet, and everyone understands God in their own way, so he estimated around 6 billion.
Another preacher told me that most Catholics won't get to heaven because they pray to saints, which is "idolatry"...

Can this be true?
Not only that, but they kinda bastardized the concept of Christianity as practiced in Israel (the originators of it), by mixing what they picked up in Jerusalem, and mixing liberal amounts of pagan worship in. Why did they do that? Because they wanted to have as much influence and control as possible, and religion was a great way to do that.
Does God give a break to the billions of people who have lived and died without accepting Jesus as their savior because nobody told them the story? Is that an excusable reason to be a heathen?
Actually, no. Before every person gets that small piece of God (your soul) placed into the embryo created by your parents, He teaches the Torah to us all. We're just supposed to remember to go looking for it and study it.
Can people go to church, give lots of money, say all the right things, and still not truly believe, thus ruining their chances for heaven?
You HAVE to believe in something bigger than yourself. Start small, and work your way up to talking to the Big Man Himself. BTW......church isn't required for worship, ask the Taoists (which incidentally have a great deal in common with the Jews).
What about stupid people who just never 'get' it?
Well......you've generally got around 14 seconds before you die, and, during that "white light" moment, you WILL get it and be offered a choice.
What about a serial killer with a death-row "conversion"?
Yep. They go to Heaven. Matter of fact, there is a story in the Tanach about a wicked man who persecuted Jews. On the last day of his life, he repented and apologized to God for what he had done. God then allowed him into Heaven.
Inquiring minds want to know...
-Joe