The basic plan from starlink runs on which mbps.
Be expecting up to 260 mbps download speed and 26 mbps upload speed.
From which internet provider, because the price of purchasing yearly subscription depends on the provider.
Irrespective of the provider, 1 year subscription is better. I have checked it before on both MTN and Airtel. But you mentioned MTN router on your previous post, which means you are referring to MTN, so I am specifically referring to MTN.