Is it true that MBA marketing freshers are offered sales jobs? Even if they are from JBIMS or SIMSREE?

This is true for almost all the B Schools. Many B Schools offer sales jobs to MBA Marketing freshers even if they are from JBIMS or SIMSREE. There are some logical reasons behind this are as follows:

• You need to know the basics to understand the higher level of knowledge 
• Eventually, you will be responsible for managing large teams. So with a sales job, you are familiarized with handling teams that do core sales.
• The exposure connects you with various people in the hierarchy 
• Your ultimate role in life will be a salesperson as you will be seeking your idea to go Manager or a business idea to your CEO, so it’s better to enter early in the field and grasp the basics.

The requirement of experience depends solely on the company you are applying to. But I will personally suggest you be flexible and open to all profiles rather than targeting a single one.