Answer 1

Console is a static class used to input and output data in console based applications via methods like read and write.
Void is a keyword used while declaring functions that don't return a value, like a method that prints numbers from one to ten but doesn't return anything.
Args is a parameter the compiler passes to the Main method for some system info. Basically some data the compiler lets the Main method use.
Finally, int is a keyword to declare a variable of the integer type, that is, which can have values from 2^16 till -(2^16) but doesn't have a decimal value. It is probably the most used data type, perhaps other than string, which is just a type that can store text values.
I hope this answer clears all doubts you have. If you still have doubts, try doing the solo learn lessons again and again, and watch tutorial on the internet.