just to see how long to saturate an L of 4.7uH
A 4.7hH "spice" coil will
never saturate. It is not a real world coil.
A 4.7hH "spice" coil
could have 0 ohms. Spice tries not to allow that because we get into infinity. (1/0, and other numbers)
Back in post #1 you connected a 1V source to a 0 ohm coil. (the voltage source has a default 0.001 ohm internal resistance) so the current went to 1000A. Then two minutes later you want to measure the current and are unhappy about the 1000A. If you did this in the real world; solder a coil across a car battery and it burns out long before you can get to the current meter. The battery probably mostly discharged.
Points to think about:
1) When you hit "run" time has gone by.
Before you hit run all the caps have charged up and the coils reached some current level.
2) Hitting run puts a meter into your circuit. (scope probe) The circuit was alive before and has come to a steady-state DC bias conditions.
3) Saturation is a function of the coil's core material, size, etc. You have not put any of that into spice.
4) Spice is not like the real world much like video games are not real. (shocking thought) To get close to real; you need to enter more information and understand limitations.
I hope you are not unhappy with me, but you just started with this program and it is hard
at first. I know you want to make a buck PWM. I can help with that. (most of us will help) Please tell us what you want made. If you have a circuit up and working, then you can make changes and see what happens. I think we need to get past this "getting started" problem and jump into seeing something working.