By 'they' I assume you mean people. Yes, millions of people around the world live in deserts, including the author of this answer.
Yes, roaches live in deserts.
Yes, crickets live in deserts.
alot of animals live in Indian deserts
Yes, there is a large variety of rodents that live in deserts.
Yes, they live in deserts and semiarid areas.
Yes, many people live in the deserts of Africa.
Yes, deer live in deserts, especially mule deer.
Squirrels do live in the American deserts.
they live in deserts
There are a number of snake species that live in deserts around the world.
Austria has no deserts.
None. Kangaroos do not live in deserts.