Help needed for a data collection project (mTurk)

First time mTurker. I’m having difficulty setting up a project. I have looked at the forums and tutorials and found some relevant help but still having difficulty figuring this out. I would be grateful for any help!

I have a data collection project where I want to setup thousands of HITs to perform the same task. Each HIT would visit a website, enter a unique addressline1, and then collect 3 values from the page if the address is found.

Since there will be a high volume of these HITs I’d like to use a spreadsheet to set it up. So I would envision the columns: website, addressline1, value1, value2, value3, addressfoundYN.

Here are my questions:

1. I’m not sure how to present instructions to the Worker to visit the website for that row + addressline1 for that row. I see how to present them with the website based on the “data collection” basic template. Do I just use html & then add “${addressline1}” to present the address on the HIT?
2. If I want multiple Workers accessing this project (not redundant workers), how can I setup the job? It appears changing “number of assignments per task” would just have more Workers doing the same HIT rather than working on unique HITs.
3. In the event that I want 2 redundant workers on each HIT (as a data verification mechanism) do I simply change the “number of assignments per task” to 2?
4. Is there a way to embed a .jpg in the Worker instructions to show which fields from the website they’ll be collecting data from (a small snip with the values circled as an example)?

Thanks for any help!