I have a Dell desktop and going to buy am IMac. Can I use my two email addresses on IMac email and can I move my word docs to Apple IMac?

Yes to both questions. Apple's mail tool has no limitation on the amount of email addresses it will handle so you are fine. All Macs come pre-installed with an app called Pages, you can open all of your Word docs in pages if you want and edit and save them in MS Word format. You also have MANY alternatives for using these docs including:

• Continue using the Pages app.
• Purchase one of Microsoft's solutions such as Office 365 or Office for Mac.
• Use a web based app such as Libre Office to work on MS Office docs.

Millions of switchers have gone before you and your concerns are extremely simple to handle.

Sure. Office is available for Mac, or there are other options.

Add email accounts in Mail on Mac - Apple Support