Help me spend money.

I have a silver 04 TDI Jetta Wagon and would like to do a few things to it in order to keep it around eventually as an extra vehicle.
WVWRR61J04W031372

Here's the goal. Spend $5000
What I want to do:
Improve handling
Give it a little more go power
Improve breaking
Add rear lights with orange turn signals
Add fog lights
Add factory style ground effects or body mods
I have no interest in gaudy teenage junk. Factory front side and rear

Nooooo problem!

Go to 17" wheels, and 312mm rotors/calipers/knuckles up front, and 256mm for the back.

Cupra R rear axle bushings.
Stock front LCA bushings, and purple PowerFlex rear.
Billstein HD shocks all around

Now, how much is 'a little more go power'?
Depending on the answer, it is either a Stage 1 tune, or Clutch, injectors, turbo, 3 bar MAP sensor, charge air joint upgrades and a Stage n, with n>1 tune....LOL
cheers,
Douglas