Is it legal for an employer to make personal telephone numbers available to other employees that are not management personnel

Your can refuse, but your employer can require it as a term of employment, and you can be fired. Your call I suppose. One option: get a google...

Private employers generally do not have to advertise a position.

I see lots of issues with this business model... find a local attorney.

Can I sue for sexual harassment

You can certainly make a claim, but it is unlikely you will recover much.

Is a private business and they can set their own terms. They may owe you back money if you prepaid, but they can set their own standards.

Do all companies need an EIN before making business ?

Yes. It should apply for a taxpayers id.

I own a sm dog grooming biz in cal. i only have 5 employees do i have to give them comission on top of there hourly min wage ?

No. You don't have to provide commissions. You just need to pay minimum wage. Practically speaking, if you can't find good employees, or if...

Long service leave right word to ask employer to pay

The word is "severance" or "separation benefits", but there is generally no legal requirement for the employer to provide that unless it was in...

Assuming the leave is for medical purposes, the employer can indeed require you to use it whether or not it is in the handbook.

Is this private debt agreement enforceable?

Much depends on whether or not there was appropriate consideration for the promise to pay 100k. Without seeing the agreement, and knowing more...