No This means those companies can be your sponsor to get a greencard. On the other hand, you have to be a citizen or have to have a working visa to work for the company which does not have a sponsorship. No This means whether those companies pay your relocation fee or not. This is a list of your desired annual salary range. This applies only for full time jobs.
Amount is in U.S. dollors.
Many companies require degrees for their jobs. So, choose your degree or less to qualify for this requirement. Type keywords unless choose categories.