Adding logins and permissions

Hi,
I am at a company with 18 employees and I have 11-12 databases in SQL server. I can't seem to give logins and permissions to groups. Is there a simpler way, or do I have to add every single employee to each database and give permissions?
You may create roles (it's a group analogue) within databases and then assign your employees to these groups. There are no serverwide groups except of builtin server roles.