Mor Help Pls! Truck not starting... followup still not starting...

Hoping to figure out what's going on...

A month or so ago my truck wouldn't start - heard the starter clicking, but wouldn't turn over at all. Attached my jumper battery to it, started right up. Didn't run it long (maybe 3 minutes) before turning it off. No more problems starting after that... until today.

I did the same thing - strong click, that's it. Tried jumping it, didn't help - even left it on there for a long time... took the jumper batter off. When trying to start it with the dome light on, it barely dimmed - battery showed 12.4 volts - battery sounds okay (not to mention it's not very old). Alternator is almost new (not that it couldn't be defective). Pushed my truck and put in gear trying anything - thinking maybe the starter is jammed and moving it might help. Nothing. Finally it started for whatever reason.

I just changed the starter and solenoid assuming that was the problem (and even if not feel better about having a new one in there) - well of course it wasn't the problem - it's doing the same thing. I've checked all the connections too... everything seems tight.

So I'm now thinking it's the ignition? Any thoughts?

And if so... how do I get the new ignition rekeyed to match my doors? Is that possible? Thanks!!