Brother,
the red and black bucket seats with the turbo written on them are my favorite. typical mid 80s style masterpiece. There was however another trim for bucket seats which were non red n black and more of a vitz style as compared to the typical separate head rest style.
as far as grading goes for 4 door its like:
1-Cx (most loaded , some came with sunroof as well and 13 inch alloys , 3 and 5 spoke steering wheel) some with turbo
2-cs (minus the sunroof , alloys , rpm , 3 spoke steering wheel , had wheel caps instead standard size set as with full fabric)
3-cf (front 70s style side mirror , grey interior , no wheel caps , bigger bucket seats.
4-blanche (more or less like the cf though had blanche wheel caps , diff interior colours , some had no clock.
5-cg - the base model which came in 85-86 with everything standard , brown interior and am radio ,
6- Detamasu (special sports tuned 2 door with turbo , body kit and 14 inch alloys)
7- Diesel (diff varients with diesel engine.
BR