About addresses: you don't have to live at address for 5 years to list it.
If you lived at address A for 1 year, address B for 2 years and address C for 2 years, you list them all because it was in the last 5 years. Same about current address. List your current address, it doesn't matter you didn't live there long.
Part 4. Correct, unless anybody applied for you to come on immigrant visa, the answer is No. K-1 is non-immigrant.