Fasting

They should start to fully pray when they are seven. Fasting depends on their ability and most children begin when they are 7 or 8 years of age.

You stop eating when you hear the adhan as it is prohibited to eat or drink when the dawn breaks. Sunrise has nothing to do with fasting while sunset does.

You can have suhoor till the adhan.

He should break his fast when the sun sets, whether he is on land, sea or air.

There is no evidence to back up this claim.

You must stop eating and drinking when the adhan starts.

As long as there is Day and night, one must fast the day regardless of its length.

No, it is not permissible as both are obligatory fasts.

Yes, in shaa Allah, since he did not ejaculate by his own actions or thinking.

It seems that it is to be said after you break the fast and sip water.