it's normal for this car, i would stay away from the 2017-2019 OEM rotors and upgrade to the 2020 oem versions or giro discs. 2017-2019 have the holes where the dust gets stuck and causes those ugly grooves. Pads in the rear will wear out super fast compared to the front.
you can get a spare tire from here.
http://hondapartsnetwork.com/assembly/48/4/4/11/8/26374/2017-Civic-Sedan-SI-6-Speed-Manual-Temporary-Wheel-Kit
you will need to order part (#1) which is the set that comes with the rim and accessories and the tire itself (#30)