1. It’s what happens when the government is overthrown. All regulation goes out the window

2. I don’t know if it was the ONLY way but maybe the best way. And it was a way to give a little history about the Mandalorian race

3. My guess is he rebuilds and reprograms IG-11 to follow his commands

4. I think he knows the importance of baby Yoda and that’s why

5. I think he takes it to another planet and leaves it with someone he trusts