How to enable SSH in Raspberry Pi and connect through Putty ?
You need to know your Raspberry Pi's IP Address (use a tool, for example, http://www.advanced-ip-scanner.com/br/). If you are using raspberry pi 3, I think you need to create a blank file name "ssh" in your SD card boot folder to enable ssh connection. And then try to connect, open Putty, fill in the IP address in host name, select a port, connection type=ssh, and click "Open".
It will probably ask you for a name and password, the default is: user: pi, password: raspberry