Currently somewhere around 4 refined.
I am fairly sure that Strange items can only be aquired from random drops.
No. the stock weapon for the scout is the scattergun. In the demo video for TF2 the scout is armed with a nailgun, which is a legacy weapon from the original Team Fortress. There might be a air powered scattergun in the steam workshop, which are Community made weapons. NB: also in the TF2 demo, the demo man is armed with dynamite. :)
2 to 3 keys
In the trading community, a Strange Holiday Punch is worth about 2 to 3 keys.
I believe there originally was, because it was shown in the demos held by a scout, but I am guessing it has been removed either by an early update or before the game was released. There is a scattergun tho. It is used by the scout, but isn't air powered. It is more of a double-barreled shotgun with the end sawed off.
1 Refined Metal, give or take
Team Fortress Classic and Team Fortress 2 is developed by Valve Inc.
Team Fortress 2 was initially a Quake Mod (Team Fortress), for Capture the Flag and Team Deathmatch
Team Fortress happened in 1996.
Unusual hats in Team Fortress 2 worth a lot because they are unique and different, hence unusual. Not a lot of TF2 users would have them and that is what makes those hats stand out from the rest, and as a result, they are worth quite a lot.
Team Fortress 2 is the sequel to the video game Team Fortress. There are similar characters and missions in both games, but the main differences are the new maps and new statistics capability in Team Fortress 2.
Team Fortress does not have levels.