If filing a PPA for an attachment for an existing gadget, is the existing gadget included in the description and drawings?

I would include it and explain how your invention adds to that invention. Just point out that the other thing already exists. To me, it helps...

Can I still apply for a patent after a year with the Idea?

You can have an idea for 20 years and still apply for a patent. So the short answer to your question is "Yes, you can still apply" But as...

I have a product that is in development but no prototype yet, what can I do to protect my idea?

Most likely, you should get a patent application filed as soon as possible. As others noted, prototypes are not required to file a patent...

If I use recycled materials, combination to form an unbreakable new material how would I patent the idea.

Do a patent search at https://patents.google.com/ and see if you can find things like your idea. If nothing like it, then contact a Patent...

Type of agreement necessary for intellectual property protection?

You need an attorney to draw up a licensing agreement for you. Many patent attorneys, including myself, do these pretty regularly. :)

What is the difference between a patent and a trademark.

Trademark the name of the business and/or the business logo. You can file for the trademark if you intend to use it, then you can start using it. ...

What is the best way to find a reputable patent attorney, and how much should I expect to pay?

I would ask patent attorneys to show you examples of patent applications that they have worked on. Also, talk to a patent attorney and see if you...

I want to secure a patent for an idea (products?). What's the best way to go about it? How and what would it cost me?

You secure a patent for an idea or products by filing a patent application. Sometimes you merely want to file something that lasts for a year to...

I have filed for my provisional patent. What’s next?

#1 -- if you filed your own provisional patent application, you might want a registered patent attorney or registered patent agent to review it to...

I agree with the other two answers. Plus, you don't know what the other company knows or doesn't know... so what if after they would even sign any...