Hi and welcome to YT....You'll really like it here...
1) YES YES AND YES...You should get insurance...These lil furbaby's are just like children
2) PM red98vett and she will do everything for you...As far as setting up your avatar
3) I never did anything except trim the ears and they stood up all on thier own...1 before the other but it was cute while it lasted
4) I have mine on Nutro- Puppy- Lamb and rice formula
Hope this helps you out at least a lil bit....
Goodluck Your in for a real fun treat ..Raising a Yorkie is the best thing in the world!!!!