1 - Maybe
2 - Not really. Consoles' lifetime is getting bigger. But five years from now you'll get the first games in second-hand or at a discount.
3 - If your friends think like you, they won't.
4 - Yeah but... piracy is wrong. And if you like videogames, you should buy games.
5 - It will probably be cheaper, but see no. 3.
6 - Yeah, probably. But new features will arrive and, with them, new bugs.
7 - See no. 6
8 - See no. 3
9 - Probably not but, by that train of thought, you'll never buy anything because "a new and better product will arrive soon".
10 - Yeah, I guess.
11 - Debatable. Many games don't have a PC release (but I believe that is changing).
12 - Everybody wants you to buy their product. You are free to do what you want.