The following link will probably help. Flight School - X-Plane.Org Forum
Not that I know of. However maybe finding a Virtual Airline might help in that regard.
YES!!! http://www.x-plane.org/
Org Store is payware, Be forewarned your wallet will cry. Also the files section is were all the downloads are. TONS and TONS of stuff.
Best thing I can tell you is adjust your roads in the rendering options.
Also If you need any hints on flight planning I can give you a few. Not sure what you are looking for in that area.
Also if you have the CPU/GPU you may want to try this site X-Plane 10 HD Mesh Scenery v3
Its freeware HD scenery.
Also I did an AAR in the 777 for X plane a while back, Not sure if it will help you but here is the link Flying the Boeing 777 In X-Plane---AAR
And as always any questions ask!