I have a business and someone is using my business and my name with a slight misspelling and advertize on google with his tel #

You need to hire a firm like mine to bring a trademark infringement lawsuit. Our contact information is at http://beckermanlegal.com

I have purchased 30 original copies of a choral work. Can I lend, rent, or sell these to another choir?

You're free to lend, copy, or sell them. However that does not include the right to publicly perform the work.

Hi, I am hoping to create my own business selling art ; mostly by OWN created from an art class I took in schoolR

This is a complex area of the law at this time, and not one susceptible to a simplistic answer.

Can I alter used clothing and resell it with some sort of disclaimer on the receipt?

It's unclear to me whether you're talking about single articles of clothing, or about making multiple copies. If the former the answer is simple....

I authored a business presentation that was well received by my superiors. How can I 'copyright' the material?

There is a lot of additional information I would need to answer your question, but if you own it you can copyright it, and if the company owns it...

Yes it is.

Can I use an existing business name if they are not registered? Does it just depend on who registers the name first?

I can't tell from your vague question. If you want to form a business you should just go to a lawyer and get it done. If the name's unavailable you...

Would this be intellectual property infringement?

If you took the pictures, yes. It is impossible to tell what your options are in view of the paucity of information you've provided. You need to...

I make EDUCATIONAL songs from karaoke tracks of popular songs with own lyrics, and my own vocals... can I sell them?

Almost undoubtedly no. There are ways to get permission, but not easy ways.

Business name protection

It's a complex question, but instead of asking questions on the internet you should be hiring a lawyer to start developing your rights... filing...