Also, try turning the headlights on and see if they dim at all when you turn the key, if not it must be electrical problem
If so, could be battery.
If you jump-start the car, remember the Over Voltage Protection fuse can blow, so don't be surprised if you then get poor idle and stuttering when cold.
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black