Err.. Yes.
Joseph Smith organized the Church of Jesus Christ of Latter-day Saints (commonly called the "Mormon" church) in 1830.
I could find no reference to a "Joseph Serra" that related to founding a church. However, the Mormon church (Church of Jesus Christ of Latter Day Saints) was founded by a Joseph Smith. A Father Junipero Serra was a Franciscan priest (Roman Catholic) who founded a group of missions in Mexico and up and down the California coast, in the 16th Century. He did not found a church, unless you are referring to a mission church.
John Taylor was the third president of the Church of Jesus Christ of Latter-day Saints (the "Mormon" church), but his middle name was not Joseph. He converted to Mormonism six years after it began, so he wasn't one of the original leaders, but he was an early leader. I couldn't find any record of a John Joseph Taylor being an early leader in the Mormon Church.
i'm not sure but i would be willing to find out. Another answer: There are some similarities between the words of Ellen G. White and Joseph Smith. The similarities are not significant enough, in my opinion, to prove that she plagarized or was influenced by Joseph Smith's teachings. She had a similar upbringing to Joseph Smith and that could be why she used some of the same terms and had similar ideas. There is no evidence that she ever quoted the Book of Mormon directly, but she did use some of the same terms that the Book of Mormon uses (terms such as "carnal security", "bar of God", "plan of Redemption", and the idea that mortality is a time of "probation"). The strongest evidence of copying the Book of Mormon is that one of her visions somehwat resembles a vision recorded by the ancient prophet Lehi in the Book of Mormon.
After the government of Illinois ordered the Mormons to leave in 1846, Brigham Young decided to lead the Church membership to the west because Joseph Smith had prophesied years earlier that the Church would finally find a home in the Rocky Mountains. The combination of being ordered to leave Illinois and Joseph Smith's prophesy lead them to create the trail.
The Church of Jesus Christ of Latter Day Saints (commonly called the "Mormon" Church) began in upstate New York, in the area around Palmyra and Fayette. It was here that Church members believe Joseph Smith was visted by God the Father and Jesus Christ, where an angel taught him and lead him to find a buried ancient record, and where he translated and published that record into the Book of Mormon. Following the publishing of the Book of Mormon, the first church meetings were held in Fayette.
Joseph Smith helped the Mormons by creating them! Mormons (members of the Church of Jesus Christ of Latter-day Saints) believe that Jesus Christ restored the true New Testament Christian Church through Joseph Smith. Without Joseph Smith, there would have never been a such thing as Mormons. You can learn more about Joseph Smith and how he founded the church at the "Related Links" below.
Brigham Young actually didn't make many changes to the Church. Everything that Brigham Young did was in response to previous instruction given by Joseph Smith. For example, Brigham Young moved the Church to Utah because Joseph Smith prophesied in 1842 that the saints would find peace in the Rocky Mountains. Brigham Young expanded the practice of polygamy, but Joseph Smith had preached in favor of the practice as early as 1831 (polygamy officially began in 1843, still with Joseph Smith's approval). Brigham Young also expanded the practice of consecration (the 'United Order'), which Joseph Smith taught in 1834. (The practice is also found in the Bible and the Book of Mormon.) Brigham Young also expanded temple building (begun by Joseph Smith) and performed temple ordinances, which were given to him by Joseph in 1842.
Yes. There have been many real men named Joseph Smith. The most well-known Joseph Smith was a real man who lived from 1805 to 1844 in the eastern United States. He founded the Church of Jesus Christ of Latter-day Saints (commonly called the "Mormon" church).
Joseph H. Smith was the inventor of the Lawn Sprinkler. I could not find the exact date or location of his birth, but he patented the sprinkler in 1897, so we can infer that he was probably born between 1840 and 1870. He was an African-American, most likely born into slavery. It is possible that he himself did not know his exact date and location of his birth. He is not to be confused with Joseph Smith Jr, the founder of the Church of Jesus Christ of Latter-day Saints (the "Mormon" church), who was born December 23, 1805 in Sharon, Vermont.
Joseph Smith found the plates that he translated into the Book of Mormon, along with the Urim and Thummim (mentioned in the Old Testament and a means of translating the plates) buried in a hill near his home in upstate New York. Members of the Church of Jesus Christ of Latter Day Saints (commonly called "Mormons") believe that he was lead to the place by an angel. You can read the Book of Mormon, which he translated from the plates, or learn more about this story from the links provided below.
I'm assuming you mean a Kirtland Safety Society note. It depends on the type and condition of the note. There are a few places you could try to contact to get the note appraised. See the "Related Links" below to find people to appraise it.