Doubts about agentless, remote control and managing license

Hello,

I am thinking to install ocs-inventory in my department. I have some doubts, if anyone can help me I would appreciate.

I want to know if is possible do inventory agentless with wmi or is necessary to install one agent in every computer.

Also, I am interested in remote control, is neccesary to install teamviewer or ocs-inventory have one tool for this.

Is it possible do software and hardware inventory with agents? Have it some tools for managing software license?

Thanks and sorry for my english.