Never, ever, ever, ever, ever, ever pay anything to a potential client before you start work. The only time you should be paying anything to a client is if you are legitimately refunding them for a specific reason.
**RUN FROM THIS CONTRACT**
Unfortunately, almost all of the typing jobs you see on Upwork lately are scams. Also, almost all of the people who ask you to communicate by Telegram, Whatsapp and Skype are scammers. So if you see contact information on a job post, it's a good one to avoid.
This is a good article to read to help you avoid different types of scam jobs.