1. No idea, looks like a hybrid. Might be the famous fake Weser, but can't say for sure.
2. Some form of Nepenthes albomarginata. A closer picture of a pitcher would help, but nice find from a garden center!
3. Some sort of Sarracenia hybrid.
4. Pinguicula × 'Tina'
really have no idea but first and last one are looking much much beautiful. if you are interested in growing the wild flowers plants as they suits normal weather conditions you can take help from www.ukwildflowers.com/Web_pages_intros_indexes/thumbnail_ZtoA_index.htm