The Ambassador cannot be directly crafted. There are five other ways to get it though:
Chat with our AI personalities
it is only dropable unlockable or tradeable you can not craft it
You can either play a lot and hope you get lucky. Or you can craft extra dropped weapons into hats.
Yes. TF2 is a GREAT game, and I recommend you "buy" it. TF2 is now free to Play.
No you cannot trade weapons for beta tf2 to normal tf2. Beta Tf2 is considered to be a completely different game by steam. Therefore the two game's inventories are not compatible.
Try lowering your graphics settings.