What do you want to know about them? They are small brushed direct current motors. Do you need to replace them?
Well I wanted to modify it but I need to know how strong they are and what kind of power it needs. Would it be possible to modify it into an fpv or should I just start from scratch?
Well, you can get some super tiny fpv cameras soldered onto video transmitters now, in fact I was sent one to test yesterday. Something like this: https://www.spektrumrc.com/Products/Default.aspx?ProdId=SPMVA1100 - though the one I have doesn't even have the plastic case, so it's even lighter. I know the parrot mini drone would be able to carry that. It might be easier to start from scratch if you want to do a nice fpv setup though, but then again maybe you want to have some fun modding your mini drone?