I'm constantly hearing my mother complain about this 2004 cra- crossfire.

I'm no mechanic but I'd like to help her, I've changed spark plugs, wires, fuel filters, done oil changes, replaced staters, all of this stuff on other more simple vehicles, but all basic stuff so I don't know what to do here.

Let me start off by listing everything that's wrong with this car.

Ceiling lining losing adhesion, interior roll cage panels falling off, cigarette lighter stopped working, rear wing stopped functioning(randomly stays up, goes down), cup holder broke(no tension), right window button fell through console now sitting in the hole 3 inches deep. Key doesn't turn in ignition unless played with. (Saw that as being common on here a while ago)

It's like this car was made by Fisher Price. (I probably shouldn't be bashing it on a crossfire forum, but can you blame me? All this stuffs breaking with regular use, the car's not even being treated bad.(Besides mechanical maintenance but that's not my fault. The only thing that's maintained is brake/oil/maybe trans)

Now onto more serious stuff.

The air conditioning blower/fan comes on "literally" randomly with no pattern of behavior whatsoever. It can stay on for 30 minutes or 5 seconds. It can not come on for days, and work for two. But I'd say 85% of the time it's not working.
*Compressor engages fine and the air is cold.

A few weeks ago we went to go some where and when the car was fired up it felt like 2 pistons where firing. The whole car was shaking violently and sounded like hell. Next day? Normal.

Earlier this week, car would turn over but not fire up. Few hours later? Normal.

I'm about done with this toy.

*All stuff in bold is what I think might be related.