You can't tuurn off the assists for the Licences - they are default. With progress, they will go and some will have them some won't.
As for the Pace Car, you can't turn it off. Whole nature of the Pace Car is to be in front of you. Having said that, you'll notice that if you overtake it durnig Licensing, you'll fail the test. It has been driven by CPU, and it is programmed to be faster then you for about second (+ / - 0.300 sec margin).
Pace Car is driving the perfect racing line, and it is braking on exact braking points for particular corner. It is a very good way to learn entry and braking points for tracks.
Also do not be fooled by split-times. Since there is no ghost-car in Full-Lap Liences, splits are times between you and the Pace Car. You'll realise there is no way to see have you been faster then your previous attempt without the ghost, but that is the case - you have to drive as fast as you can and watch the splits for the lap. not fot the car. Faster you - faster Pace car, and car split-times will basically stay the same all the way untill you pass Gold-time.
After I coped with those new "rules", I actually found this new system much more intresting then the Ghost one. Naturally, Pace car is driving with you only the full-lap Licence tests.