Well, the meaning of the word "Pagan" is an old English word for "valley dwellers". I know what you mean, but I just wanted to get that out of the way. By standards nowadays, Paganism is a generalized term covering many different pantheistic religions and traditions, including Wicca. A good way to understand that relationship is this: Lutheranism is to Christianity as Wicca is to Paganism. So, simply put, the answer to your question is "yes".
In a way both are modern. But Wicca is more modern overall - since it is a branch of witchcraft. To better explain - All Wiccans are Witches, but not all Witches are Wiccan. Paganism is the oldest religion involving witchcraft.
Wicca and Neo-Pagan is similar yes. I don't understand your percent 2 those.
While Wicca claims to have ancient roots, modern Wicca was invented by Gerald Gardner in 1954 so it would be 60 years old this year (2014).
No, Wicca has no connection at all with native American beliefs. It is a modern pagan religion developed in England in the early 1900s.
There is some debate about whether Wicca is a new religion or one of the oldest. Certainly Goddess centered worship has perhaps existed since before recorded history, but the modern Wicca movement was started when Gerald Gardner, known as the father of Wicca, published Witchcraft Today in 1954.
Many Wiccans regard their modern faith as the restoration of a nature-based spiritual tradition that reaches back through the earliest ages of pre-history. In the historical sense, the modern practice of Wicca began with Gerald Gardner in Britain in the 1930s, or, according to some claims, in the 1920s. Many different groups, schools and forms of Wicca branched off from that original group very quickly. Gardnerian Wicca and the related Alexandrian Wicca, continue to thrive today. Some feminist and other forms of Wicca now have very little in common with the Gardnerian tradition.
In essence, Wicca is a modern spiritual practice based on older pagan rituals; Goth is a post-punk, contemporary subculture in the areas of music, aesthetics, politics, philosophy and fashion.
There are a lot of books out there, as well as many websites. Here are a few of my favorites... Wiccapedia by Shawn Robbins and Leanna Greenway Wicca: A Guide to the Solitary Practitioner by Scott Cunningham Good Luck!
Wicca has its own scriptures.
Wicca isn't based anywhere.
No most modern practitioners consider it just a nature religion. It's ok with him if you appreciate what he made for you
This question has never truly been answered. Many people believe the first organized modern practice of Wicca was started by Alyester Crowly. But the ideals of Wicca and the traditions date back much further. They go back to some of the first civilizations. Celtics, Druids, Greeks, Native Americans, Norse, and Inca all have had the same common practices related to Wicca today. Wicca is a diverse religion with no real 'right' or 'wrong'. So in many ways the person who follows the religion creates their entirely own practice. Many modern Wiccans do not even associate themselves with Alyester Crowly or even the first societies who shared the same traditions. It truly depends on the individual person as to the opinion on where Wicca originated.