to add what WK said,
Can't no1 : that's strict, you won't get NOC, normally, so you can't chnage job, however if it's some good professinal company, they do provide NOC for job change.
Can't NO2 to 6 : you'll get NOC very eaily for all this, any employer provide these NOCs.

as far your wife's job: yes she can work (some peper is mandatory which is not bothersome).