"How to take the back of my Motorola. Don't know what kind it is"に関する回答If it has a non removable backplate, the model number is usually on the bottom next to the charging port, or on the back near the bottom. the numbers are very small and may be hard to see. If it is a Moto G6, then I think the model number on those was just on a sticker that could have fallen off the back, so… upload a picture?
"Moto g6 Plus replacement screen and tool kit?"に関する回答You can get an OEM replacement screen here. https://www.mobiledefenders.com/mobile-parts/motorola/g-series/moto-g6-plus.html They also have tools and basic repair kits (not as good as ifixit, but cheaper), but it still might be kind of expensive if you are only doing one repair.