Decat, 1 bar restrictor ring, boost controller, TRL fcd if you
can get one,
grade 7 plugs (copper, platinum or iridium, copper are super
cheap, iridium will be around £45 for 6
Run at 1.2 bar and you'll have around 400 fwhp
I'd be inclined to pop some new engine oil in along with
oil and air filter.
Infact before you go BPU i'd be giving it a full service unless
its been done recently.
Check all fluids and replace if req, check rad cap and engine coolant
Use o/e Toyota for filters rad cap thermostat etc
I'd also do a brake fluid change and fit braided lines while your
at it, also give the brakes a once over and make sure all the pistons etc
are free and working as they should and check the main lines under the
car