You can attack with a monster and then tribute it in the same turn, yes. Obviously if you tribute it first, then it can't attack unless you've got a way to bring it back to the field.
Yes
Yes, you can attack with the Tribute Summoned monster unless a card effect tells it not to or it is after the Battle Phase.
Elamites and Assyrians attack Babylonia.
Yes, of course you can. You can tribute it for the cost of an effect, or in main phase 2, for a Tribute Summon.
Those who attack it.
Yes, it can.
One can eat healthy and do excercise to prevent a heart attack.
Tribute summons are performed in the main phases, as are synchro summons. So if you have an attack phase and attack with one monster, the only way you can use it as tribute for a tribute summon (or send it for a synchro summon) is to enter Main Phase 2. If you do this, then you won't be able to declare an attack with the new monster since you have left the battle phase. The only thing you could do really is use an effect that can Special summon while you are still in the battle phase.
Yes, in 1973.
24 B.C.E then they were demanding tribute from Kush.
No, you cannot download it to a Surface.