1-) I'm running OEM 17inch rims with Continental MC5 215/50R17 - personally speaking they're the best tires for the Accord in my humble opinion, they're grippy, low-noise with excellent comfort tbh.
2-) Using Unichip is a decent option if you don't want to alter your stock ECU configuration - Used it on my 1.3 2012 City and trust me I was highly-satisfied with the results. If you want a flash, Maxpower Lahore is doing them for 20,000 (approximately) - Both options can have your 180-limiter removed as well. It's not advisable to experiment with your stock ECU, just my advice lol.
3-) Shoving a Turbo kit would be extremely expensive if I'm being really straight forward with you. All parts will have to be imported - Tuners like HPR can hook you up but it'll set you back quite a lot. Supercharger is a wise decision though again, it won't be cheap as well.
4-) Euro R meter are available in Pindi (rare-find) but remember they're for a manual-transmission and not compatible with the CL9 auto-transmission - Type S meter I doubt you'll find one anytime soon because the one you want is a 2006+ model and honestly I haven't seen much Type S 2006+ model in Pakistan.