The PvP where you level is WvWvW, where you still have to have the weapons and unlock the skills by using the weapons and traits open as you level. SPvP does not provide experience.
"Getting into the fight at any level – You’ll be able to jump into WvW right at level 2 with the same character you just created, no need to make a separate character. When you get in you’ll be at the portal at the entrance to your server’s Borderland. Your stats will automatically be adjusted to appropriate stats for a level 80 character if you’re under level 80 so this allows everyone to be on somewhat of an even footing. Granted that level 80 character is going to have a lot more skills, Traits, and experience, you won’t be instantly killed by the level 80, but they will have a clear advantage. Though this doesn’t mean you’re worthless, you just can’t expect to go up against a level 80 at level 2 and win. They’ve mentioned that one-vs-one fights aren’t too common so it shouldn’t be all that much of an issue. While in WvW players and mobs will give you XP and loot that is appropriate to your level when killed so you can level all the way to 80 while in WvW. When you jump out of WvW you take everything you’ve gained with you back into the PvE world."
-Copy pasted from the stickied thread. Please read them for more info.
sticky:
http://www.mmo-champion.com/threads/...tiated-READ-ME!