This script teleports everyone to the same block for some reason, can someone help me fix it?

It's because you're setting the player's position to the same teleporter at the same time. To make it so it's a different teleporter you would make it so it teleports the player to a teleporter using the index assuming theres the same amount of teleporters as players.

local plrs = game.Players:GetChildren() 
wait(70) 
local teleports = game.Workspace.Teleports:GetChildren() 

for i,v in pairs(game.Players:GetPlayers()) do 
    local char = v.Character 
    char:FindFirstChild("HumanoidRootPart").Position = teleports[i].Position
end

plrs = game.Players:GetChildren()
wait(70)
tps = workspace.Teleports:GetChildren()
for i=1,#plrs do
    for a=1,#tps do
        char = plrs[i].Character
        char:MoveTo(tps[i].Teleport.CFrame.Position)
    end
end

You can use :MoveTo() to teleport Model.

I don't know why you put line 1 and line 3

plrs = game.Players:GetChildren()
local teleports = game.Workspace.Teleports:GetChildren()

that doesn't do anything.

Here is script

wait(70) 

for i,plrs in pairs(game.Players:GetPlayers()) do 
    local char = plr.Character 
    for i,teleports in pairs(workspace.Teleports:GetChildren()) do
        char:MoveTo(teleports.Position)
    end
end