Just bought a used car. How can I maintain it?

I just bought a used car. How can I maintain it?

I saved up for 3 months by working at my first job and now I just bought a car!

It was $1200 for the car and $600 for the tag, title, and insurance.

On the title, we clearly deemed the mileage on the odemeter to be 174,000. (roundabout).

However, now that the car is mine and I'm driving it on the roads… I can clearly see that the odometer reads 274,000… (roundabout
Naturally, I am a bit concerned about that so I want to do my best to keep this car in the good condition that it still is for being a '92 Ford Explorer.
I'm interested in doing everything I can to keep it alive and well for as long as possible.

I'm kinda looking for maybe a list I can print out and familiarize myself with so I can get into a routine.

Oh, and one more thing… Is the odometer measuring miles driven or another unit? Because I reset the TRIP Odometer and it's 4 digits… It says "0085" already… The 5 at the end will become a 6 in like a minute of driving… If I'm going like 35.

It must be measuring something else? I stayed within the boundaries of my city and I got this car this morning. There's no way I already drove it 85 miles!

Back to the original question…

Can someone give me an in-depth answer?

For example: Don't just say "Change the filters and fluids!" because I don't even know what filters and fluids there are to change!

Try to be as specific as possible please… And thank you!

The best answer will get some points! :)

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