Yes, Nokia 1 does have the FM radio.
No. Nokia 1 does not have the front camera flash.
Yes, Nokia 1 does have the light sensor.
Yes, Nokia 1 does have the MicroSD card slot. You can use MicroSD card of up to 64 GB capacity.
The Nokia 1 is an inexpensive Android smartphone, and as you can tell from the Nokia 1 review, you very much get what you pay for.