There is not one-stop shopping on these parts or the reset tool for oil changes. As Fredvr indicates most of what you seek is already on the forum.
Oil & Filters are easy to find or order at multiple auto part locations including Amazon and Maserati Dealerships, (some of which will discount parts sold through parts department).
I've bought brakes (pad/rotors) plus other parts from different vendors depending on delivered price .... R1 Concepts, CARiD and Formula Dynamics are vendors on this forum. While others have used AW Italian and Scuderia as reputable options for parts to name a few you'll find.
Shawn, don't take it personally, It's like on any forum, to avoid cluttering the forums with multiple Posts on the same subject, it is good practice to use the search function, then and only then if you don't find what you need, you create a new post, or answer on the existing related post, like this it brings it back up to the top of the list for more visibility.
As Beerguy said, there are many posts already dealing with this subject.
From oil to filters to brakes, to tools to reset the oil service spanner etc etc...
Welcome to the Maserati enthusiastic.
I purchase all my OE parts from: www.scuderiacarparts.com
They provide everything you will need from a fraction of the price of the dealership.
And enjoy the ride!
Welcome to the forum Shawn and congrats. If you are looking for instant gratification and answers to questions, the Facebook Ghibli forum will provide that. Pretty much a mess though of the same questions over and over and people posting pics of pimped out Maserati's.
I wish the traffic here was a bit better, but it is what it is, there either is not enough of these cars on the roads to create the same enthusiasm BMW's (etc.) do or most owners just aren't enthusiasts DIYer's etc.
Personally, it doesn't bother me to see repetitive questions here, we should take what we could get in terms of new members. I do agree though, the search engine will get you the fastest answers. If you stick around, you should get used to waiting a day or so for a reply usually from the same 5-10 frequenters. That's pretty much the traffic here. Expecting a same day answer and bitching about it isn't going to get you anywhere.