I know who you are, and you might be surprised to find out how many of us know you.
The matter of losing your job; if you are sure that they let you go on some pretense that makes it look like your own fault, contact the National Labor Relations Board.
In the matter of a car; check the classified ads in your newspaper. When you find something interesting, go to your computer and bring up www.Kelley Blue Book.com and find out what it is really worth. Then go look at it. If you like it, go into the computer again and bring up www.Carfax.com. Enter the V.I.N. This will tell you if it has a history of flood or collision damage. Then hire a mechanic to road test it. These two will cost you a few bucks, but buying a lemon will cost you many more bucks, and you will be stuck with it.

Good luck to you, and remember, you are not alone.