ScreenGui countdown display issues?

1. How would I make the clock display two digits instead of 1 constantly without it showing "3:0"?

2. What can I do to stop the clock at any time? (i.e. when touching a part, the clock is disabled and stops counting down)

3. How would I clone this from ServerStorage? (So that I can spawn this during the final event)

Also, it only works when all scripts (except the second one) are enabled.

Ensuring the minutes and seconds values are written in the textbox constantly

while true do
    script.Parent.Frame.TextBox.Text = script.Parent.Frame.TextBox.Minute.Value .. ":" .. script.Parent.Frame.TextBox.Second.Value
wait()

end

Incomplete: if the seconds reach from 0 to 9, add another 0 in front of it so output would not look like "3:0"

while true do
    script.Parent.Frame.TextBox.Text = script.Parent.Frame.TextBox.Minute.Value .. ":0" .. script.Parent.Frame.TextBox.Second.Value
    wait(7.5)
    script.Parent.While.Disabled = false
    script.Disabled = true

end

The actual timer

wait (7.5)
for i = 1,2 do
    script.Parent.Frame.TextBox.Minute.Value = script.Parent.Frame.TextBox.Minute.Value - 1
    script.Parent.Frame.TextBox.Second.Value = 59

    wait (1)
    for i = 1, 59 do
        script.Parent.Frame.TextBox.Second.Value = script.Parent.Frame.TextBox.Second.Value - 1
        wait (1) 
    end
    end

The tweening part + hint message with a sound

local frame = script.Parent.Frame
wait (2)
hint = Instance.new("Hint", workspace)
hint.Text = "Let's put three minutes on the clock..."
wait(2)
script.Parent.Sound:Play()
frame:TweenPosition(UDim2.new(0,700,0,450), 'Out', 'Elastic' ,1.5)
wait(1)
hint.Text = "On your mark..."
wait(1)
hint.Text = "Get set..."
wait(1)
hint.Text = "GO!"
wait(2)
hint:Destroy()

This is part of a Legends Of The Hidden Temple style project, specifically the Temple Run segment.