Questions About General Capabilities

I'm considering switching from **Third Party Product** and had some questions regarding capabilities.

• I have five computers...two Windows and three Macs.  Is Teamviewer free considering they're my computers and I'm the only one connecting to them?
• Computer A has Teamviewer installed; computer B does not have Teamviewer installed.  Can I use computer B to connect to computer A using a browser?  Or do I need to install Teamviewer on computer B?
• If I were to connect to a Windows computer from a Mac, is remote printing available?  Same question in reverse...is remote printing available when connecting to a Mac from a Windows computer?

Thank you for any/all responses!

Eric