Does my boss have the right to tell me I'm no longer able to park in front or around the store?

The short answer is yes. It is the employer's property. If you are disabled and have the sticker they must allow you to park in a handicap area

Do I have to ask permission from my employer to teach this material at a college or to start my own business?

If this was me, I would call a local lawyer and run down what I was going to do for all around advice including how to set up my biz. Good luck

Can I ask the former employee for a medical release prior to offering the job again?

The plain answer to your Q as far as federal law is concerned is no you cannot! Call a local employment atty

Do I have a case?

If you are in a protected class. . .you have the beginning. If you are not in a protected class and others are not being treated differently then...

Is this legal?

If you caused it. . .but that Q and my A is not as simple as it looks. Please call an employment atty

Do I have a case against that past employer depending on the grounds that they terminated me for?

There is not enough info here. . . . but please do not post any more. Call a local employment atty for help

Is it legal to have vacat and personal time taken away because I don't receive my insurance through my employer?

It can legally be done as long as it is done to everyone in your situation

What can I do about this

Please post no more...instead call a local employment atty ASAP!

Can an employer only allow you to redeem a % of a gift card because you are an employee?

Forget about whether it is legal or not. . .it is not worth pursuing for your job . . .is it? In fact it is legal

Get rid of the tenant. the tenant committed a fraud. No real penalty