Need help with electrical problem

Coils can certainly do something similar. Have you checked voltage at coil +? Both with key "in run" and engine stopped, and with engine running?
I can't check it with engine running because I can't get it to start but don't know how to check coil. Can you explain how? I have a meter but suck at electrical stuff. If you put one lead on the coil + where does the other lead go? Thanks for your help.