They may ask for a passport photo the very first time you register at a particular police station, it just happened to me after moving house recently.
You don’t need 2), but it may help for filling in the field on the form for your school or company name and address, you can provide this information from memory; again this is only required if it’s your first time registration.
For 4), to be on the safe side, you need a copy of your landlord’s ID card, a copy of the apartment rental contract AND a copy of the first page of the landlord’s deed for the apartment, which proves that the landlord actually owns the apartment.