Most likely a bent shift fork.
Put it in neutral if it wont shift at all something is broke internally.It does not have a reset button and no proceedure to be reset...sorry
Some can be started in this gear, yes.
Plenty.
most likely you can find it in the motorcycle store
Your motorcycle might idle fine and bog out when in gear because of a problem with the carburetor or the bowl. If either area is dirty, it will often bog the bike when in gear.
yes, but it is the gear ratios that affect the overall speed
varies based on the type of motorcycle and the engine size
You broke it.
You can bid on motorcycle rain gear at eBay. They have tons of auctions right now from slightly used to new condition motorcycle rain gear. If the bidding aspect doesn't appease you, you could go to Amazon and purchase it outright.
They started in 2002
Gear up then
The best place on the internet to get gear is motorcycle superstore