It isn't. :)
Yes.
You can freeze a cake twice, but it won't be as good. You should freeze it no mroe than that, though. A cake should be eaten after it is baked. Freezing it once is alright, twice can manage, but a lot of the flavo and texture will be lost.
No but you can use it to make frozen yogurt cake.
15 Layer Russian Honey Cake
Yes, most types of cake can be frozen.
Of course. Glass won't crack!
Yes but not too long
Yes.
Yes, it can be though I recommend it be all individually wrapped. Do not freeze entire cake. Remember to use freezer bags and/or plastic wrap.
The cheese cake will freeze, however the cream cheese frosting will not.
For no more than 8 hours.