I just ran through a tutorial and here are some answers:

1- what is using namespace std; too hard to understand am 12 years only
its a statement that means you're using the standard namespace -- you're using code already made by other people so you don't have to "reinvent the wheel". Also, this is used rather than typing std::cout or std::cin (I think)

2- what is int main ()
int main() is the main function of a c++ program. However if you have 'int' at the start, you'll need to have 'return 0' because it's expecting an int. You can fix this by saying 'void main()' which returns nothing.

3- what is the difference between cout and cin
pretty simple. cout is output and cin is for input

4- i want swiftdude's base the detected one so i can work on it
Idk what that is

5- how can i make the base undetected? or that is in the book? or it is easy or what?
not sure if this specific thing is in a book. try using ollydbg to make it undetected (changing the name of stuff inside that the protection looks for)