1) it is said that they cant never be in any place that has a high temperature, and the problem is, i live in malaysia, and its hot everyday, we have no '4 seasons' here.
I don't know how hot it is there but I would think they can stand it.

2) im only 14 years old, and my parents warned me, if i were to rear a dog, i'll have to take 100% responsibility towards it. Am i able to take care of it, and most importantly, CONTROL it?
It depends on how much time you are willing to put into training.

3) it is said that siberian huskies are very active, they LOVE to run. I have some space for a dog to run about. But then there are gates, and there are holes between those gates. What if the husky(puppy) runs away through those holes?
You could cover up the holes in the gate (if your allowed).

4) im still a student and i spend 6 hours per day in school, and 3 hours tuition on weekdays(mon,tues,fri). Im afraid that the time that i can spend with the dog will be too short. Im afraid that he will get lonely. As my parents work from day to night, and while im in school, the only person left in the house is my grandma =.= Siberian husky can be destructive when they're lonely, while im not at home, who knows wat the dog might do?
Can you walk home? Maybe you could get your grandma to let puppy out to go pee in the backyard. Also I would suggest crate training your puppy so he can't be destructive while your out (and it will help with accidents)
There are a few people who are young on here who go to school and have raised puppies and they are just fine.

5) once a year, siberian husky shed their coats. And they lose a lot of hair, is it very irritating to see hair dropped all over ur house?
For that you should keep them regularly brushed, if you can afford it go to the groomers every once in a while (when puppy sheds the most) and they will blow all the dead hair out which will help alot with shedding.

6)i only plan to buy 1 husky, and no other dog can accompany him while im away, will it go crazy if i juz leave him inside the kennel until i come back home from school?
That's like the same as crate training I would assume so I would think so.

You seem pretty responsible if your only 14 and doing so much research, maybe you should go with a different dog though.