485麵談需要的體檢,擔保文件 - depends on your visa petition

For medical examination I-693
it is required if the last I-693 has expired (one year according to DAOs). Therefore, whether you need a I693 depends on when you ted your I485. People would play saft by redo their med exam. Generally, DAO will take them.

As for I-864
NO I-864 needed for employment based I485 interview. But you MUST bring: 3 years tax return, including W-2. Employment Letter stating your current job duty and annual salary. Last 6 months paycheck stab or copy of checks.

If family -based 485, I-864 is a must. Not only ur above info needed, Itax, W-2 etc), the sponsor has to provide the same to prove financial capability.