This does not necessarily sound like a matter of sexual harassment, the site may have mis-classified your question.

Can I sue a co-worker?

When you say harassment, do you mean sexual harassment? Is any form of discrimination going on?

Can I work at the same company if it's a different location than before? I quit, I wasn't fired and I was already hired as well

Without a union to go to bat for you, they can choose to hire you or not if they believe you had something to do with the register discrepancy.

I took leave from my job for several months almost a yr When I put in for leave I was suppose to receive my paid however

It can't hurt to try, do not delay.

Is it legal for my employer to say that I owe another employee money if they have been depositing their checks into my account?

Certainly they are entitled to the money back. If it is a hardship, consider asking for a payment plan and pointing out it was their mistake.

Am I being wrongfully denied a job?

It may be time to speak with a local employment attorney, depending on the specifics it is possible that you have a claim.

What legal action can I take ?

It sounds like you are experiencing unacceptable racial discrimination. I suggest speaking with a local employment attorney right away.

Can I sue my former employer for wrongful termination or defamation of character ?

Were you a member of a union? If not, do you feel that any form of discrimination may have been in place here? Do you have any proof that the...

Is it legal to make employees with an approved accommodation take those break at set times if they don't know when they will be?

If the employer is not honoring the required accommodation, even including the timing of that accommodation, then those individuals may have a...

Can I get denied a job because of an arrest if there was no conviction?

Your answer will be fact specific, so I recommend speaking with a local employment attorney.