How to make my character lunge forward(A couple studs) after a certain animation?

Hello, I have a question in terms of how to get my character to lunge forward a set amount of studs after performing a certain animation. I'm trying to mimic a certain greatsword's moveset. I have the animations done for it, but I'm stuck on how to get the user to lunge forward when it performs the lunge attack. If the community here was able to help me, that would be very swell; it certainly would help make the sword feel like a greatsword with the weight of it propelling you forward after a lunge.

I'm not quite sure where to fit in the script the bodythrust?

If you were able to leave an explanation on how it works and where to fit it in, that would be very find. I'm using this template for a sword due to inability to script one that would fit the characteristics of the weapon I'm trying to make.

Oh, and one more things; how do I add one more "combo" to it? Say if I were to add 4 animations to the moveset instead of the existing three.

Thank you for reading and possibly helping me get past this problem. If you are interested in the progress or what the swords look like, they can be located at my place.

Script

local tool = script.Parent


local speedboost = 1.00 -- How much speed you gain when you hold the sword, 1.00 means no speed is added
local damage = 100 -- How much damage your sword takes, 100 is a character's full health at default
local swingtime = 1 -- How many seconds until you can swing it again
local combowindow = .5 -- The amount of time at which you have to click again to move on in the combo


local debris = game:GetService("Debris")
local handle = tool:WaitForChild("Handle")
local event = tool:WaitForChild("RemoteEvent")
local slashsound = handle:WaitForChild("SlashSound") --Change SlashSound to the Sound you want it to play in combo 1
local overheadsound = handle:WaitForChild("OverheadSound") --Change OverHeadSound to the Sound you want it to play in combo 2
local lungesound = handle:WaitForChild("LungeSound") --Change LungeSound to the Sound you want it to play in combo 3

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" ) -- Change SlashAnim2 to the animation you want, the name has to be EXACTLY like the one in the tool
                slashsound:Play()
            elseif combo == 1 then
                event:FireClient(player, "RunAnimation", "ThrustAnim2" ) -- Change ThrustAnim2 to the animation you want, the name has to be EXACTLY like the one in the tool
                overheadsound:Play()Play()BodyForce.Force = Vector5.new(1000,0,0)
            elseif combo == 2 then
                event:FireClient(player, "RunAnimation", "OverheadAnim2" ) -- Change OverheadAnim2 to the animation you want, the name has to be EXACTLY like the one in the tool
                lungesound:Play()
            end
        end
    end
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)