My dad was involved with the Mormons for a while, and as a kid (5 y/o) we had regular "Elders" visit us, really nice guys who tried to convince me that tinned spaghetti was made from worms. Later on in my late twenties I worked for a guy in Croydon that was an appointed man in the local congregation, and had quite lengthy discussions. So unless thing have changed
1) Yes they do beleive in Father Son and Holy Ghost but not as a defined trinity as per the Athanasian Creed (which can't be found in a bible anyway).
2) They are/were very respectful around the subject of Idolatory, so you won't find crosses and such in their churches (Tabernacles) that are bowed to or placed in areas of venoration as you do in many of the denomination.
3) They tithe, so 10% of their earnings went to the church, but as I understood it the resources accumulated went back to support congregations in need.
4) They were known for a polygamy, but as I understood it the church has a fracture line, and the more modern approach was towards ending that in favour of monogamy.
5) They don't drink coffee or alcohol, but oddly enough cocoa -cola was ok; they clearly hadn't read the label and worked out what was in it.
6) They are known as a evengelical group, so preach and teach door to door in the same fashion as the early Christians.
The most famous mormon family that I can think of was probably "The Osmonds".