Ignition switch I can't figure out on where and how the springs go back in

Need a bit of clarification, do you mean the lock cylinder where you put the key or the electronic part that actually does the switching? If it's the first one and you have all the pins and retainer clip your best option would be to take it to a locksmith with the key. They can install the pins, springs and clip so that the key will work properly. I have re-keyed a bunch of them but it is very easy to put the wrong pin into a hole and have it work until you install the cylinder and it jams because that pin is in the wrong place.