The weak T in trust may be a filled die, but there would be no premium for a coin like it. The others are all just damaged.
Lightly tapping a coin repeatedly around the edge will make it look like this. It is just damaged.
Yes, glue or something similar.
Nothing at all wrong with asking questions, if someone doesn't want to answer they don't have to. The coin was probably damaged long enough ago...
Yup, another coin has just been pressed into it. Probably vice marks on the reverse.
Not an error, it is just damaged.
Separate names with a comma.