Clustered index and Fillfactor

I am beginner of SQL server .

I have read about Clustered index and Fillfactor for the first time.

1. Clustered index and Fillfactor is only for MS SQL server and Oracle database do not have them ?

2. Does MS SQL server users configure Fillfactor usually when they build new SQL Database and tables ?

I heard about fillfactor and its default value is 0(there is no reserved space for new data) . I thought default value is set around 80% or something like that.