Our company didn't buy any perforce, but I want to use it. For example to install the server and client, is there any license issue?
By default, perforce supports two users and five client workspaces, that's enough for our small company.
detailed licensing as following..
Licensing
You may use software downloaded from Perforce for any purpose you want and for as long as you like, provided no modifications are made to the software.
The Perforce Server supports only two users and five client workspaces unless used with a Perforce License. We will be happy to issue you a free Evaluation License to remove the user/workspace restrictions for a limited time.