jackacon

That really depends on the size of your ram. If you assume a typical ram to be between 45-160 KG, then I think you could get an extra 200-300 GB of storage. However, you'd need to check that your motherboard has the capacity to take the extra ram. And don't forgot that it's a lifetime commitment; you'll need to feed it, pay vet bills, and generally look after it like any other pet.

You can't send things in to be fixed by iFixit, it's more of a resource where you can try to fix things yourself. If you do an Internet search, you can probably find repair shops in your local area who could have a look for you.

Could well be the headphone jack is faulty, it's quite a simple fix: iPod 5th Generation (Video) Headphone Jack & Hold Switch Replacement

Is there a specific reason you're using FAT32 instead of NTFS (which I assume it came in originally?) Might be worth reformatting it into NTFS and seeing if that works.

You can try a forced reset by pressing and holding the menu and centre buttons. But the battery has probably died by now so it might be OK!

To be honest, the headphone are so cheap it's hardly worth trying to fix them, I'd just buy another pair and cut your loses.

Might be worth a look at this thread from a few years back: Remote Key lock not working It's for a Focus, but I can't imagine they're too dissimilar

You probably just need to enable contact syncing. Tap settings > your name > icloud > change contacts to green

The printer doesn't use ink, the paper that goes through it reacts to the temperature of the print head, a bit like a till receipt. You might need to clean the print head, or it could be a faulty print head

I couldn't find anything on that specific model, but I did find this on YT, might work for yours? https://www.youtube.com/watch?v=oZLViYTn...

Could be a poor quality battery. The first one I bought of eBay was shocking, then I bought one from the ifixit store and it's been so much better.