Sikhs and Jews do not share any of the same holy books.
Yes...I you have any doubt, watch "Breaking Amish" on TLC.
... The Bible
There are Amish or other plain sect congregations on every continent except Antarctica.
yes.
Yes
There are Amish in Puerto Rico. However, I don't know of any hispanic Amish.
No more and no less than any other general group of people.
Yes Buddhism does have holy books, and they are very important to Buddhist. The Tipitaka, is the believed to be the direct words of the Buddha.
The holy book of Islam is the Qur'an. It is the word of Almighty God. The other holy books are the different volumes of the sayings of the holy Prophet Hazrat Muhammad (May peace be upon him).
The Amish and Mennonites are generally Anabaptists. They do not baptiz any but adults, who have repented their sins, begun a diffeent life, and adopyed Christ as their savior.
An Amish person is free to do what he or she wishes to do. The Amish community avoids modern technology, but they do so by choice, not due to a lack of freedom. And any member of the Amish community is also free to leave it and enter the mainstream of American culture, which some choose to do.