If IRCC asked about the government job details, they you are most likely going through a comprehensive background/security check which might take years, unfortunately.
You get assessed against many factors, one of them is a travel history. If you don't have one, you need to have stronger points for other factors to compensate lacking travel history.
Yes, you can add your spouse but check your score if it doesn't drop below your draw cut off.
IELTS taken after the ITA but before the submission date is acceptable .