SamBones has put you on the right path to finding the heat output of the servers, but your other questions can't be answered without a lot more, detailed information.
2. How that heat is taken out of the rooms, and;
3. Any idea as to what the temperature is (Fahrenheit) that is removed from the room?
#2: Depends on the building and the cooling system. Some systems are "closed circuits"...meaning they don't exhaust any air out of the datacenter. They "inhale" hot air in from the datacenter, cool it, and then "exhale" it back into the room. However you do it, hopefully, you have cooling and heat removal systems that are dedicated to the datacenter.
#3: Depends on several factors. How cool you keep the room. If you run your servers hot, then the exhausted air will be warmer than if you keep the room cool. Another factor is the size of the room and the location of the vents. If the vent are directly above the server racks, then the air will be warmer than if it is on the other side of a large room. Highly utilized systems will produce more heat than those that pretty much sitting idle. Room design (hot isle/cold isle) may prevent heat removal or promote it. The quicker the air is removed after passing through the server the warmer it will be.
Again, to help out more, detailed information is needed.
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