The people directory will be available to the managers of the organisation. These are all the people you have added through the "Invite Manager" tab.
Currently this is not a standard option. Should this be a business imperative we could discuss the issue further.
Whenever a freelancer is onboarded you will have to ask them for their rate. Both parties can request an amendment to the rate after that.
NOTE: if you change your rate this will not ...
There are two places where a worksheet can be raised:
1) In the project itself
2) In the payments section