How to make the character "dash" after a certain animation plays?

I'm not sure why this won't work/if I'm even doing it right.

local tool = script.Parent


local speedboost = 1.00  is added
local damage = 100
local swingtime = 1
local combowindow = .5 

local debris = game:GetService("Debris")
local handle = tool:WaitForChild("Handle")
local event = tool:WaitForChild("RemoteEvent")
local slashsound = handle:WaitForChild("SlashSound")
local overheadsound = handle:WaitForChild("OverheadSound")
local lungesound = handle:WaitForChild("LungeSound")

local lastclick = tick()
local combo = 0

local lastclick = tick()
local combo = 0



handle.Touched:connect(function(hit)
    if equipped and character and humanoid and humanoid.Health > 0 and hit and not hit:isDescendantOf(character) then
        local targethumanoid = hit.Parent:FindFirstChild("Humanoid")
        hithumanoids = {}
        if targethumanoid and targethumanoid.Health > 0 and not hithumanoids[targethumanoid] then
            hithumanoids[targethumanoid] = true

            for _, v in pairs(targethumanoid:GetChildren()) do
                if v and v.Name == "creator" then
                    v:remove()
                end
            end
            local tag = Instance.new("ObjectValue")
            tag.Name = "creator"
            tag.Value = player
            debris:AddItem(tag, 3)
            tag.Parent = targethumanoid

            targethumanoid:TakeDamage(damage * (combo + 1))
        end
    end
end)

tool.Activated:connect(function()
    local clickdelta = tick() - lastclick
    if clickdelta > swingtime then
        lastclick = tick()
        hithumanoids = {}
        if clickdelta < swingtime + combowindow then
            combo = (combo + 1) % 3
        else
            combo = 0
        end
        if player then
            if combo == 0 then
                event:FireClient(player, "RunAnimation", "SlashAnim2" )
                slashsound:Play()
            elseif combo == 1 then
                event:FireClient(player, "RunAnimation", "ThrustAnim2" )
                overheadsound:Play()
            elseif combo == 2 then
                event:FireClient(player, "RunAnimation", "OverheadAnim2" ) 
                lungesound:Play() 
            end
        end
    end
end)

function lunge(humanoid, torso)     
    local IdleAnim3 = humanoid:LoadAnimation(ThrustAnim2)
    if IdleAnim3 then 
        IdleAnim:Play() 
    else 
        Tool.Enabled = true
        return 
    end
    local target = humanoid.TargetPoint 
    local direction = (target - torso.Position) * Vector3.new(1, 0, 1) 
    newBV = nil 
    --swordOut()
    if direction.magnitude > .01 then            
        direction = direction.unit 
        newBV = Instance.new("BodyVelocity") 
        newBV.P = 100000 
        newBV.maxForce = Vector3.new(newBV.P, 0, newBV.P) 
        newBV.velocity = direction * 50 
        newBV.Parent = torso 
        torso.CFrame = CFrame.new(torso.Position, target * Vector3.new(1, 0, 1) + Vector3.new(0, torso.Position.Y, 0)) 
    end 
    wait(.75)       
    if newBV ~= nil then newBV:remove() end 
    wait(.5) 
    --swordUp()
end 


tool.Equipped:connect(function()
    equipped = true
    lastclick = tick()
    combo = 0
    character = tool.Parent
    player = game.Players:GetPlayerFromCharacter(character)
    humanoid = character:FindFirstChild("Humanoid")
    if humanoid then
        humanoid.WalkSpeed = humanoid.WalkSpeed * speedboost
    else
        character = nil
    end
end)

tool.Unequipped:connect(function()
    equipped = false
    if humanoid then
        humanoid.WalkSpeed = humanoid.WalkSpeed / speedboost
    end
    character = nil
    humanoid = nil
end)

It would be great if someone could teach me the proper way of inserting the "dash"/lunge function. I tried copying the one from the "Phantom Falchion" gear, but to no avail in terms of successfully merging it into this.

function lunge(humanoid, torso)     
    local holdAnim = humanoid:LoadAnimation(Tool.LungeSlash)
    if holdAnim then 
        holdAnim:Play() 
    else 
        Tool.Enabled = true
        return 
    end
    local target = humanoid.TargetPoint 
    local direction = (target - torso.Position) * Vector3.new(1, 0, 1) 
    newBV = nil 
    --swordOut()
    if direction.magnitude > .01 then            
        direction = direction.unit 
        newBV = Instance.new("BodyVelocity") 
        newBV.P = 100000 
        newBV.maxForce = Vector3.new(newBV.P, 0, newBV.P) 
        newBV.velocity = direction * 50 
        newBV.Parent = torso 
        torso.CFrame = CFrame.new(torso.Position, target * Vector3.new(1, 0, 1) + Vector3.new(0, torso.Position.Y, 0)) 
    end 
    wait(.75)       
    if newBV ~= nil then newBV:remove() end 
    wait(.5) 
    --swordUp()
end