Is there is any Drush Command for Drupal 7 to give all permissions to a newly created role?
Ok, if you don't have an admin role, then you can do this: create a role with drush:
drush role-create 'my role'
Then, you can add all permissions to the created rol:
drush eval "user_role_grant_permissions(user_role_load_by_name('my role')->rid, array_keys(user_permission_get_modules()));"