At this point its not worth buying any tools needed to work on a pulse or taking any training. Theres not enough of them left to make it worth your time/money. Its like buying the tools/training to work on a Model T. Not worth it unless its your hobby.
I've seen two of these in the last few years. Both times I told the customer about the dangers with the furnace and that they need to have a qualified technician with the proper tools come out and inspect it for safety. Both times they just told me to put a new furnace in.
That's the way I handle those calls, too.
The Bill of Rights ARTICLE II "The Right of the People to Keep and Bear Arms Shall NOT be Infringed".