Guild Wars 2

So I’ve been playing different classes but Thief was the best so far so I’ve decided to make Thief my main. I’ve been just opening maps and I’m about halfway. I’m now lv45 and I need help about what to do after I hit lv80 and where to get the gears because my other characters I just buy it off the TP and I dont want to spend like 50g for the gears and weapons. Pls help

Your first aim should be to get a full set of Berserker gear.

http://wiki.guildwars2.com/wiki/Equipment_acquisition_by_stats

If you want Exotics for cheap, your best bet should be:
Get rare items off the trading post and run dungeons. Citadel of Flame, Crucible of Eternity and Arah are the ones to get Berserker armor and weapons from. For a new player with bad equipment, I’d not recommend running CoE and Arah, so stick to the Citadel.
Prioritize weapons over armor, so get those Berserker daggers first. Especially, if you are short on money, don’t buy exotic equipment(as in armor and weapons) off the Trading Post. You will need that money to buy runes and sigils.

Also, unless you have been playing for a long time and just slow rolled your progress(and have a ton of laurels stashed), you will probably have to buy trinkets off the TP as well. If you got a ton of laurels, you can just get ascended stuff from the laurel vendor.
Especially with trinkets, if you lack the funds, buy rares. I would not recommend trying to craft trinkets off your first character. It will end up way more expensive than you could imagine.

The first level 80 character is usually the hardest to equip. Especially thief has extra problems, because with any other class, I’d just recommend getting a set of Soldier’s armor from the temples in Orr.

Edit: Scratch that. Which patch changed it so you can now buy berserker’s armor in Orr?
http://wiki.guildwars2.com/wiki/Keeper_Jonez_Deadrun
Okay, change of plan. Do a LOT of Events and map completion, don’t spend Karma on anything. You need 252,000 Karma for a full set of Berserker’s Armor. Then run Citadel of Flames for the weapons.

Get every weapon the thief can get if you’re goal is to get money to get gear or just doing dungeons to get gear. Some dungeons require different weapon sets and it’s always nice to come prepared.

Also if exploration is your thing, look at your traits and always keep a tally on which traits can be unlocked in the zone you’re completing. Given you’re new to thief you’re going to want to explore all of them (although if you ask any semi-experienced thief can tell you which traits are a waste of time) to see which fit you best.