I am sorry that I haven't been able to get back to you sooner. My internet was down for the last two days.
the first pic I am not sure what that is, It looks like it could be a mass, I would recommend taking her to the vet so they can get a sample and look under the microscope or send out to the pathologist to evaluate.
the third pic i agree appears to be a wart-type growth. these typically are only a concern if they scratch or break them open. then they usually have to come off.
the fourth pic could be a meibomian gland cyst, but cannot be completely sure without taking it off and sending to the pathologist. most of eyelid tumors are benign, but a few can be cancerous so would be ea good idea to remove. definitely need to be removed if making contact with the surface of the eye.
As for the hairloss, does she seem itchy at all? it could be they groomed her too short, or if she is itching could be allergies. you can try benadryl, dose is 1 mg per pound body weight. i would do it at least for 2 weeks to see if helps.
if there are any bumps or issues with the skin may require a vet visit.
does this answer all of your questions? what else can I answer for you?