Obama said, Pelosi said costs would go down, we could keep our existing plans and our doctors.
Clearly you can't afford your meds, so I'm certain the new system will help you. Nevertheless, I feel compelled to take on your crazy.
First, the economics of the system aren't that controversial. More people paying into the system means more money, fewer "takers" per capita, and, thus, lower premiums. The whole point of the mandate/tax was to make those without insurance, typically, the young and/or healthy, enter into the insurance system. And just to clarify, this part of Obamacare is the clearly Republican part of the scheme.
There is another factor that works to lower overall costs: more insured means less reliance on the more expensive ED system. Because under the prior system, hospitals were obligated to treat everyone, there was an overuse of the most expensive, least efficient health care delivery vehicle: the emergency department. Since those people also can't afford to pay, those costs were passed along to everyone else. Now, in theory, if fewer people have to use the ED for basic healthcare and there is better access to non-emergent care, you will lower everyone's costs.
Second, I'm pretty sure the last clause of your sentence is not even accurate. There are whole categories of "insurance" that are going away. In particular, those include insurance plans that put people in the "under-insured" category. Perhaps, put another way, you can certainly try to buy such insurance packages, but you will not escape the individual mandate.
Third, whether you can keep your doctors is still up to your insurance company, not the government. This really has nothing to do with Obamacare. What's more, there was no guarantee -- even under the old system -- that an insurance plan would allow you to keep your doctor. Of course, when the government is the insurance company, they are in the same spot as an insurance provider (think the VA).