how do i get back all my dlc weapons and my prestige master level 1000 back?

Well once your get Prestige Master you can keep leveling up to 1000.

Here's a cheap trick. After you prestige and get master on your beginning weapons like the M4, M16, UMP, etc., stop within one or two kills of your next 10,000 point kill (500 or 1000). On your next prestige, use the weapon at the first chance and within
one or two kills you get 10,000 points, which jumps you and your weapon experience to ninth or tenth level.

@Znitey To prestige weapons get it to the max level which I believe is 25 and then go into custom classes highlight the weapon and there should be an option to prestige it in the weapon selection menu. I may be off I prestiged my weapon a while ago and don't
exactly remember how I did it.

@ghg those aren't prestige tokens.... They're unlock tokens, you get 1 every level. They can be used to unlock weapons, perks, Lethals, tacticals, and wild cards that you are a high enough level for. You don't get prestige tokens until you prestige. Hence
the prestige in prestige token.

I'm Prestige Master. Get on my level.

When you prestige its supposed to go back down to level 1 and then you level back up again all the way to Master Prestige if you choose to do so. There should be a green emblem right next your level, if there isn't and its just a regular level 1 like when
you first got the game you might have used Fresh Start which resets your level and all your stats.