Hi there !
1. Search this forum or guildwars2guru.com for guides
2. You can craft or buy valkyrie armor/weapons and trinkets. you will need the exotic level 80 version, they all have the same stats and you can search for them on the tp with the search settings. (You can also craft them with 400 Leatherworking, buy the recipe from master leatherworker next to the station)
3.Not a lot of gold, laurels only for ascended trinkets
4.Do dungeon runs , look on gw2lfg.com for group. Another option is always farming worldbosses see gw2stuff.com for timers on the world events. this is for all professions btw. Mapcompletion of higher level zones gives a lot of gold too if youre lucky with your reward. Else just play the game, gold just happens.
5.http://gw2buildcraft.com/calculator/