Permissible and impermissible items of trade

Q: I have a shop in which I sell different types of toys. Some of these toys are action figures e.g. a famous wrestler, soccer player, movie character, etc. Is this permissible in Islam?

Q: Is it permissible to sell firecrackers during Christian holidays and offer freebies to attract customers to come in the store. The money from the firecrackers will be kept separate. Can you sellitems that are not legal to sell and can get fined for if you ger caught? After doing the above, can you still praise Alllah for makeing your business so successful and giving you so much barakah in the rozi and even if you are paying taxes. Please clarify.

Q: Is it permissible to run a shop selling paan and cigarates?

Q: Is it permissible to use bone meal as compost when planting trees, etc.? Bone meal is made from dried and crushed or powdered animal bones. It could be from any animal. When planting, it is thrown on the roots with manure and then covered. It could be sprinkled on the plants as well.

Q: Is there any permission to collect empty bottles of wine to sell to bottle factory (which collects all type of bottles = not only wine bottles)?

Q: Is it permissible to sell a camera?

Q: Why is it haraam to sell dogs?

Q: I bought a brand new xiaomi smartphone in 2016. But the next year after I checked on government regulations website, my phone was "indeed" proven illegal. Illegal here means imported without any permissions from the government (not stolen, I already know the rules about stolen items). So no doubt about this. This leaves me questions:

1. What is the ruling for anything that we bought, we didn't know it is illegal at the beginning, but then it is proven illegal afterwards? (again, illegal here = "avoid taxes" not stolen items)

2. Am I allowed to continue using this or should I get rid of it?

3. What level of investigations should every Muslim do for each business transaction like this? 

Q: Is it permissible to sell cats?

Q: Is it permissible to sell firecrackers?