How to reset ihpone 4 without knowing password?

So my friend gave me her secret iphone and her mum doesn't know and she can't get the password for her mums itunes.I've tried all these ways to factory reset without the password but what would work? I need to know

IPhone 4 won't connect to home Wi-Fi suddenly?

IPhone 4 won't connect to home Wi-Fi suddenly?

Added (1). My laptop is connecting fine just my phone. I did a basic reset and it's still not connecting and now when I open my apps I need to sign in again. When I go to settings my home network still comes up but it just says unable to connect.

Added (2). I made my phone "forget the network" and just resigned in. Now everything's working fine.

Locating photos imported to laptop from my iphone

I'm clueless. Approximately 8 months ago my laptop (windows xp) crashed/virus.I'm not completely sure and without my knowledge the tech (who I asked to try and save my documents/photos) changed the hardrive and operating system to windows 10. On the home page I can see a box labeled "photos" that actually streams the photos he saved but I can't find them to open them up. In addition, Recently imported photos (as a result of my ignorance and lack of attention) have been saved to a number of locations… Some in "documents", some by date, some by folder name. Regardless, I can't find many of my older and newly imported photos that I know were successfully imported and saved.

I just got an iPhone 7 and I forgot the passcode so now I can't finish setting up? It can't connect to iTunes and it's not on my iCloud?

I feel so dumb for forgetting it, I'm always bad with remembering numbers. Even though I just put it in, I can't remember it. I really don't want to call Apple Support if I don't have to. How could I factory reset it or something? I just got the phone and didn't even finish setting it up yet so there's no data that I'm concerned about. It can't connect to my iTunes or anything like that.

What can happen if i don't return the sellers item?

I have been waiting for months without not mobile phone 3 weeks now, i recently purchased a iphone 7 plus off a website called depop, using paypal as a payment method, now paypal has that the seller must not send the item until the buyers payment has cleared, my payment is in a echeque, this is because i transferred alot of money multiple times in my account, leading me to having nothing atm until the transfer is complete.So what happened was the seller already send the item, it should be here by tuesday, he has messaged me saying i should return it to her, but i don't want to because i really need a phone, paypal says that the seller must wait 18 for the echeque to clear etc. My question is if i do not return the package and use it, can he do anything or does he just have to wait? Because i really want to use this phone as soon as possible.

Added (1). Please excuse my english and grammer, as i was in a rush, thank you!

Added (2). Please excuse my english and grammer, as i was in a rush, thank you!