According to the serial number and IMEI code you provided, the mobile phone has not been activated.

Now you want to know whether you bought your mobile phone from an IPHONE store or a general school, and whether there are any bills such as purchase invoices.

It is impossible to know whether your machine is a refurbished machine now. It can be said that 4S has not come out for a long time. If the serial number and IMEI code are correct, it can be found out. I suggest selling it to your mobile phone store and asking questions.