Why did these multiple things just happen to my car?

For the past few weeks, I’ve been using my 1990 Pontiac Grand Prix Turbo as my daily driver to and from work, 40 minutes one way. I’m starting to hear squeaks at low speed, and that combined with the car pulling to the right and me not braking at all when the squeaks occur make me think it is an alignment issue. That isn’t the problem ATM, but feel free to discuss it as well.

I got back in my car after going to my grandmother’s house for dinner, started it, and the rev’s went batshit crazy the moment I shifted into reverse. I turned it off, had my internal panic attack, opened the hood, and asked grandma to try and guess what was wrong. Another attempt to start, the rev’s went up, then down below normal idle, then it stalled. A couple more of those, and it stayed on, still confusedly trying to find a proper idle speed, until it normalized around 1k on my dash (which is absolute shit, it’s probably 200 less RPMs than it displays, all the gauges are “optimistic”), which is still less than normal.

I could give it gas and shift into drive and reverse, but I heard a weird noise when I slowed down on my way out of the subdivision. It was something like a sucking-liquid noise, I really don’t remember. I can’t get to the car because it’s in her subdivision and I’m not there right now to try and coax up those noises and upload them to Utube or something, so sorry.

Anything helps. The family’s about to take the other two cars up somewhere, so it isn’t terribly urgent, but this is still annoying because I won’t be driving myself to work tomorrow…

I need to get everything checked out on this car anyways, could anyone let me know where I could get a thorough mechanical inspection?