what is a templated class?

Answer 1

I cannot say it better than the creator of C++, Bjarne Stroustrup,

"A class template specifies how a class can be generated given a suitable set of template arguments. Similarly, a function template specifies how a function can be generated given a suitable set of template arguments. Thus, a template can be used to generate types and executable code. With this expressive power comes some complexity. Most of this complexity relates to the variety of contexts involved in the definition and use of templates."

Answer 2

A Templated class is an empty class definition that you can compile without error. Check out this example

class TemplateClass
{
public:
x=0;
y=1;
TemplateMethod();

private:
int x; //Data member
int y; // Data member
};

Answer 3

sample: (MyClass)

template
class MyClass
{
public:
X Method1();
private:
X member1;
};

there's a lot of information about templates in MSDN for inst.