For reference, here are a few pictures so that you can see what I'm talking about:
[img]https://27.media.tumblr.com/tumblr_ltwo4chWPk1r3c9fxo1_250.jpg[/img]
[img]https://27.media.tumblr.com/tumblr_ltwo4chWPk1r3c9fxo2_250.jpg[/img]
1) I have a window that gets indirect sun all day. Will this be enough, or will I need to get it a grow light?
2) Is it usually necessary to repot a new bonsai after you purchase it? I'm curious to check out its roots, but don't want to if that's a bad idea.
3) What sort of pruning should be done? There are some much darker, larger leaves deeper further inside with smaller, much brighter leaves on the outsides of the branches.
4) If it should be pruned, how far to I cut back? I can tell what is new growth and what isn't, but don't know how much of the new branch growth should be trimmed off.
5) If I want to encourage upward growth should I cut away the lower branches?
6) Tray of water -- that means a full tray of water that constantly supplies the soil, via a hole in the pot, effectively creating a moat around the pot, right?
7) How in the world do I keep my cat away from this thing? Some sort of spray? Catnip about two foot away from it? She's already swiped away a few leaves, and I'm afraid that as small as it is she could completely destroy it in short order.

I have a million more questions that will surely follow. But thank you all so much for whatever help you can give.