Permissible and impermissible items of trade

Q: If a person owned a leather jacket and found out it was made from pig skin, can that jacket be sold to a non-Muslim and the funds be used to purchase another item?

Q: Is it permissible to sell collectable cards, such as soccer cards, Pokémon, etc. Also video games disks, etc.

Q: 

1. I wanted to open a candle making business where I make scented candles and candles using resin and epoxy with pearls and stones for decoration. Is this permissible? 

2. I also wanted to ask that my business will have everything to do with scents so sprays for the house and bamboo stick scents, candle massage oils and I’ll be selling to other companies like Checkers, YuppieChef and event planners to put as centre pieces for weddings. I would also like to do oud bars at weddings for customised weddings. I will also be selling ironing scents. Where, after the clothing is ironed it will be hanged and underneath it the bakhoor spoke will freshen the clothing. All of this will be from my home. 

Please remember me in your special duas, May Allah grant me barakah and Aafiyah.

Q: My brother sells Christmas trees, Christmas related products on which happy Christmas is written and he paid my education fee. 

Will my income be halaal if i use the knowledge as a job or business that I get from my education and can I live in his house that he made from this money? 

Also, he gave me a laptop that he bought from that money and I work on the laptop as a freelancer. I use the Internet on this laptop and he also pays the bill of this Internet from that money. Will my income be halaal that I make from that money?

Q: Is it permissible to sell toys or clothing that are replicas of the original brand but not the original brand itself, if the original brand has copyright protection? 

For example, selling a motorcycle toy replica with the Kawasaki branding on it or selling an Adidas top replica with the Adidas branding on it.

Q: Please advise on whether it's permissible to study a cannabis course and learn about cannabis. 

Also, is it permissible sell cannabis and cannabis products for medicinal use?

Q: A person sells balloons with a ‘Happy Birthday’ sticker on it. This is their only form of income. Is it permissible to sell this type of item?.

Q: 

1. Is it permissible for a Muslim business owner to promote his business using adverts with Christmas decorations? 

2. Can a Muslim businessman sell Christmas lights, trees, decorations, etc.? 

3. What is the ruling regarding a person decorating his business with Christmas lights, Santa Clause etc.?

Q: When I was young I had a play station. Now I am studying in Aalim class. I don't use it anymore. Can I sell my play station?

Q: I am in the business of selling sound equipment like speakers, mixers, and amplifiers. To remain competitive. I feel the need to offer a wider range of products, including musical instruments, despite knowing that music equipment may be considered haram. Given this, I have a few concerns: 

1. Is it permissible to sell musical instruments under these circumstances? 

2. If the income from selling such items is haraam, can I use that money to pay taxes? 

3. If selling musical instruments for profit is not permissible, would it be acceptable to sell them at cost price just to stay competitive in the market?