This long ago discontinued Toshiba/ Lexmark model (not sold in North America) was introduced in 2014. Support is no longer available, you are likely...
I remember that series had a problem with the toner add clutch or motor rusting and causing low density. Try removing toner cartridge, cheating front...
Like it or not, OEMs are not legally obliged to provide parts, consummables nor support for copiers that were discontinued more than seven years ago....