1) Wrong forum - try the "Developer's Corner" sub-forum.
2) Install kTerm after you jail break it.
3) How are you going to do that with a broken screen?
4) Is the device description in your info box up to date? Are you posting about a KT3?
Take the first six characters of the device serial number, look it up in this table:
https://wiki.mobileread.com/wiki/Kindle_Serial_Numbers
Every model has a nickname, please use the one for the device you are posting about -
it can make a difference to the answers.