Seat Covers:
They range from Rs2000-3000 [Fabric] and Rs 3000 to Rs6000 [Leather].
But since we have a hot climate here, go for fabric covers as they are more feaseable.
They will further ask you for an option of fitting. It will take hardly Rs300-500 for proper fitting with sewing and finishing for civic's bucket seats.
Tyres:
Get 205-65R15. Wider tyres result in a better traction, handling and grip. Even though they will make your ride more good looking.
Michelin Energy are low cost and low end tyres from the latter company. They cost 6500 a piece in Lahore. And i wouldnt recommend you those.
Yokohama dB Decible are a smart choice. Check out Khalid Bin Waleed road, you will surely get fresh pieces. They cost 8000 per piece but they WORTH it!
If not that, then Dunlop Sp Sports 9000, Pirelli P6000, Yoko C Drive etc.
Advice:
As you have a non-Oriel, get 16" Tyres instead of 15". As 16" tyres are the international tyre size for Civic 1.8 in Japan, North America etc. Ideal size for civic is 205/55R16. But then you will have to purchase rims too.
So manage your budget accordingly. 
