new auto purchase tax credit

How much is actually taking over a car lease and what type of credit is needed?
I've been watching and leasetrade.com swapalease.com and there is a large number of publications as I have very excited. Cars that normally would be about $ 10K of my price range been forthcoming. But I'm sure there must be a trap. Sales Tax seems to be one of the most obvious – I owe sales tax on the value of the car, the rest of lease, or only a portion of the lease that I am paying? That the tax would be due if someone bought the car in a state? Out of state? Etc. The other is the credit – my credit is excellent (especially the car-buying credit), but my score is lower due to BK. Although it generally qualify for interest rates in 1/4th of a point lower, leases require credit know a little better. Can I get a significant pay higher during a transfer of lease? For that matter, if the purchase of someone with bad credit that I could pay off? In addition, there other hidden fees should I consider?
The good thing about a lease is that no sales tax on the value of the car. Only sales tax on the monthly payments. For the state or outside state issue, it depends on where the vehicle is registered. For the first payment has to pay registration fee for the DMV. In terms of credit wise I would have to contact the lessor, are the monthly payments to you based on your credit.