would help us ALOT more if you actually explained what you actually modded/did to the vehicle. you want us to read your mind? you want us to log onto your computer to see exactly what youre talking about.
xbox 1 controllers will work just fine. You'll need a usb to micro usb cable for plugging the xbox 1 controller into your pc, or if your pc supports bluetooth you can connect it the wireless way you were wanting
dont maximize the window manually, change your screen resolution to your monitors native size. and set Input Grabbing to ALL to fix the double cursor thing