Here is my answer to your 4 questions:
Yes
No
Yes
Yes
for the response, Liebling. At least someone responded to my query, but I'm more curious about your reasoning behind your answers. The economy is a complex thing that's affected by so many factors. It's not like the president has buttons that say "Good Economy" and "Bad Economy". Anyway, here's my perspective, although I'm no economist and only have a limited understanding of how things work, so I'm sure there's plenty of room for debate here.
To me, it doesn't make sense to give Clinton all the credit for the good economy in the 90s but none of the blame for the recession at the end of his term. The main thing driving the good economy in the 90s was the rise of the internet. He had no control over that. If Clinton deserves credit for anything, it's signing the welfare reform bill, although the Republicans in Congress pushed that on him. The recession at the end of the 90s was caused by the burst of the internet bubble. So the very thing that drove economic progress in the 90s went too far and caused a bubble burst.
As for Bush, the fact that the economy did so well from 2003-2007 is pretty amazing considering the problems he faced- the economic recession left over from Clinton's term, 9/11, and all the corporate scandals like Enron, Tyco, etc. I think his tax cuts helped a lot with that.
I also feel that he deserves some, but not all, of the blame for the current economic slowdown. For his part, he spent and borrowed too much, and allowed the Republicans to spend far too much when they were in power. It was far more than war spending, too. It was entitlements, pork, etc. They were not acting like conservatives. However, the congress of the late 90s was also to blame. The current economic situation is largely due to the housing situation. In the late 90s, congress pushed lenders to give loans to riskier people. They were lamenting how hard it was for the poor to get home loans. So due to pressure, the lenders started giving risker "subprime" loans and sure enough, it didn't go well. Now congress is trying to blame "predatory lenders" for the problem. Some lenders may have been unscrupulous, but as usual, politicians create their own problems and then whine about it and refuse to take the blame. Then there are problems demand for oil going up and commodity prices increasing everywhere.