Vivo Y81i comes with 5V / 1A charger. It does not support the fast charging.
Yes, Vivo Y81i does have a dedicated MicroSD card slot.
No. Vivo Y81i does not come with the earphone in the box. You have to purchase it separately.
No. Vivo Y81i has 2 dedicated slots for sim cards and a dedicated MicroSD card slot. You can use 2 sim cards and a memory card at the same time.
No. Vivo Y81i does not have the fingerprint scanner but it does support the face unlock.