If you are looking for web resources, there are some good British ones. Try the RHS section aimed at kids: http://www.rhs.org.uk/Children...
Since no clematis experts have chipped in, I'll offer my limited experience. I grow a 'Nelly Moser' up an old and quite large lilac. It gets about...
I grow sorrel, parsley and mint in the shade under a tree. Also leafy veg, green onions from sets, peas, and beans in areas that are sunny for...
This may be of help: http://www.finegardening.com/how-to/articles/pruning-lilacs.aspx
I think those are snapdragon seedpods.