parts:

https://www.ebay.com/b/Auto-Parts-and-Vehicles/6000/bn_1865334

https://www.rockauto.com/

tool sets:

https://www.youtube.com/watch?v=JB7nCJFMhF0

Some local stores will loan you tools:

https://shop.advanceautoparts.com/o/loaner-tools

https://www.oreillyauto.com/store-services/rental-tools

never pay for someone to do:

• wipers
• air filter both cabin and engine
• If electric or hybrid then there may also be an air filter for the battery cooling.

If you intend to keep the car past 5 years then you need to wax it. The wax is not to make it look pretty, it is to protect the clear coat and paint color. Think of was like sunscreen for your car.

cleaning:

No need for a detailer provided you have the time and patience to do the work yourself. But do your research first. The cheap common stuff that you see advertised everywhere and has a common name - is often terrible for car surfaces. example: Armor All is complete garbage and long term leads to cracks and peeling. The only armor all brand thing you might use is the tire shine spray because tires are consumable. You absolutely cannot use whatever you have sitting around in your kitchen or bathroom cabinet to clean a car.

If you can get under the car or use ramps then:

car ramps: https://www.youtube.com/watch?v=cM6rVfUnYP8

You can also make your own ramps out of spare lumber. Plenty of directions on how. Most people make them interlocking so that when put in storage the ramps sit on top of each other one of them upside down.

Fluid Film - the good stuff is lanolin based. Lanolin is used on babies and even nursing mothers nipples. So it's as safe as it gets. You can spray exposed metal to prevent rust.

oil change - on most vehicles, some cars require oil to be suctioned out - this used to be only some German luxury cars but it is getting more common.

transmission fluid - Depends on vehicle. The easiest thing to do is either open the drain plug or unbolt the pan. Measure how much fluid you remove and add that same amount of fluid back. This gets maybe a third of the fluid. Anything beyond this is usually beyond DIY. If you have a belt or chain CVT then take it to a shop every 30k miles that has the machines to do a full fluid change.

PCV: replacement. Depending on your vehicle you might change this every 50k or 100k miles. A small piece of plastic can destroy your engine if it fails. It really depends on vehicle and engine. An engine that burns more oil, is more sensitive to pressure, or driving conditions with lots of short trips/stop and go, may need the valve replaced sooner. A shop will charge you 200$, or tell you the valve is fine when it is not. You can buy a valve for 20$ and replace it in 5 minutes with basic tools.

Brakes:

On old cars brakes are easy. On newer 2015+ cars, or some older speciality/luxury cars they may have a very specific sequence of events you need to do to prevent damage or the computer from getting pissed off. I have two cars, one I will do the brakes on myself, and one with AWD, traction control, blah blah, that I refuse to touch.

When under a car:

Use jack stands. Jacks can fail. Ramps can fail. Jack stands are unlikely to fail, especially if you use 2.

If you have a spare tire slide it under the car. If the worst thing happens at least the car won't completely crush you. You will be able to call for help or if thin enough slide right out.

Grab an OBD2 scanner to periodically check for codes the cars computer is detecting: https://www.youtube.com/watch?v=UR9RLgfV-qM

In general don't leave the scanner hooked up all the time, just when you need it. Some scanners and some cars will very slowly drain the battery with a scanner plugged in. Some car computers can act weird if you drive around with the scanner hooked up. I have a small one with a cable connected to a basic lcd screen with a few buttons so I can clear and retest or reset oil change, and it has bluetooth if I want to see a full screen of data on my phone.

If you don't have time, a bad back, or live in an apartment that bans working on your vehicle:

You can find people who will do a full detailing, ceramic coating, and fluid film for like 200-300$, but they do the work at their home and in their own time. Drop the car off friday night, come back sunday or monday and they will probably have done the work. But maybe they didn't have time or didn't feel like working and you have to come back a different day/week. You will be paying cash/paypal/zelle, no credit cards or checks.