Odoo customization

We recently migrated from Highrise CRM to Odoo.
The Odoo is hosted internally, but some features are clearly missing.
As the Odoo instance is already populated with confidential information, we don't want to give any access to it.
We would like to have some modification procedure to follow to make it fit our needs.
Here are our main needs :
- Having a personal email dropbox. Like in Highrise, you can forward (or put in BCC) an email to your personal dropbox email address. It create a new prospects if it doesn't exist yet, or adds it as a new activity for an existing prospect or customer.
- We would like to have an Activity wall were you can see all activities done. On this page, you can see all emails sent to customers, calls, meeting...
- Contact view from Company view: In Odoo, when you have a contact that is child of a company, it show on the Company view. But when you click on it, it only opens a simplified view with of the contact whereas we would prefer being moved to the Contact full view. Also, the Company view should aggregate all activities of its child contacts.