Roles and Permission

Can you make some predefined roles like :
1. Auditor: have read only permissions to All the data as admin.
2. Employee : can only access to customers assigned to him. Make invoices and receive payments by them.

I made some roles but there are not appearing for user roles in user management pages.
Please help!!!

are there any writeup of roles? I have created an Admin role. Then the checkbox on other roles are greyed out.