Permissible and Impermissible employment

Working for a company that scams people

Q: I am working under a company which scam people but my job is to give them money and send them to the other people who will soon scam them. 

What should I do? I need to spend at least 6 months here to go back to my country or I need to pay them 1700$ to get my passport + I need ticket money too. So I have no idea what to do. Please guide me through this difficult time.

Working for a company that requires one to have meetings via video call and have an employee ID with an image

Q: If one works for a company in which one has meetings via video call, is this job still halaal and is the income earned still halaal? 

And if the company you are employed for at sometimes advertisers using photography on their company website or requires you to have an employee ID with your image on it, will the income be halaal?

Working in a grocery store that sells haraam meat and alcohol

Q: Is it permissible for me to work in a grocery store? I will need to stock up shelves with pig and haraam meat and also halaal products such as bread, fruit and clothes. I will need to stand at the till and scan the goods for the customers (cashier). It is approximately 90% halaal goods, but goods such as cigarettes, haraam meat and alcohol are also sold. Can I work in this place?

Producing ads for people

Q: Is it permissible if I start a business doing ads for people? As far as I understand, the ad is digital and does not physically exist. If I stipulate the condition that you are paying for the service of making the ad will it be permissible? 

What is also the ruling regarding buying something, like an ad which is digital, as it doesn't physically exist and qabtha cannot be done?

Taking a salary from a person who took out an interest-bearing loan

Q: I am a student. I teach my aunts son mathematics. This is my first job as a student. I always wanted to earn halaal or I have a wish that my first salary or income will be atleast halaal.

My question is, somehow, I know that my aunts source of income comes from riba or a bank loan or something or fraudness which is haraam. Is my salary halaal or haraam? I am confused. Please explain, if it is not halaal then I will teach him for free. 

Working online under someone else's name and profile

Q: My sister recently applied for a tutoring job with good payment online. However, due to being occupied with household chores, she asked me to tutor the kids under her name and profile (without the one who hired knowing) since I am looking for a tutoring online job too. I'm not as qualified as her although I'm qualified enough to tutor those kids but I refused thinking that it would be a deception. Was this act permissible?