Hello~
1)
http://rki.kbs.co.kr/learn_korean/lessons/e_index.htm I found this site the most detailed
smile 2) ey - (consonant in front of)ㅔ이
Lensey 렌제이
ㅈㅔ이 is used cuz s in the name sound more like ㅈ (z or j) than ㅅ (s)
3) No two vowels cannot be beside each other
4) Go to control panel (classic view)> Regional and Language > Keyboards and Language > Change keyboard > Add > Locate Korean > Check everything under it > Set the shortcut button > Done!
5) ...I don't understand your q
crying