well your shit out of luck dude. should have called the police when it happen. insurance isn't going to do crap since there was not police report filed. the only thing you can do is take her to court and hope that you can prove your case. but since there is no witness or anything you will have a...
the ticking is normal for cars that old. it just needs to be adjusted or heads needs to be rebuilt if your that concern about it. as far as the oil thing if it's not leaking then it's burning it up.
if you mean dangerous as in, will they go out and race with it and act stupid and get speeding tickets then yes. a G35 is the same thing as a mustang in that way.
well, your not going to get any returns for tuning up the mazda. what ever money you put into it is consider lose investment. so unless you just like the tuner stuff and working on cars, just get the BMW 3. they hold their value pretty good.
it's on the bottom of the engine, where the engine and trans come together. it's not hard to spot. it's round and about 7 to 9 in. long and held in place by 2 bolts.
well if you know what it does when it's on then it shouldn't be that hard to know why someone would turn it off. it does the exact opposite of what it dose with it's on.