I'm sorry to hear of all your difficulties. If you stay with it, eventually you will have a vehicle you understand, and will be completely sorted out. If you dont have the stomach for it, and I would not blame you, sell it.
As for your newest problem, sounds like the classic case of an alternator failure. Double check the conections going into the alternator. If good, make sure good batery connections, especially positive side. As for the speedo thing, thats wierd but may have something to do with the fact your alternator is not generating power.
Keep us posted.
