The 'toner bottle' should be distinguished by having an open top or 'neck' or the like. A true usable-toner cartridge should never have an opening that faces upward - debris or paper dust would get into it and contaminate the toner.
Are the ghost images at all 'streaked' or streaky or otherwise uneven across the page?
That could, if so, mean a defective or deteriorating doctor blade... which might have more-abraded parts on it, letting through some spare toner.
The 'drum' or the developer would be colored and yes, metallic. As opposed to rubbery and red, which would be in some types, one of the fuser rollers.
The fuser roller - if that's what the red roller is - would be quite hot, skin-burns hot.
You can do a cleaning yourself. It's standard maintenance procedure. Would you like the procedure to do so?
(-Thanks for the abundant information you've provided so far.)