Add air to a tyre yes
Change oil do you mean change oil, or just top it up I wouldn't change the oil because I pay for that as part of a service, but I can and do top it up.
Change a wheel on your car yes
Fix a bike pucture yes
Put up shelving yes
Change a plug adhering to all safety advice and best practice yes
Put together a cabinet-size piece of flat pack furniture yes
Set up a home network yes
Diganose problem and mend toaster well I'd check the fuse, after that, probably replace it because it's 10 years old and shite, so would welcome being able to justify buying a new one
Change element in an oven probably, it will be on youtube, so I'd just copy that. However, that's something else I'd not bother to do as we have two ovens that hardly ever get used since the purchase of the air fryer, so a broken oven would be a good excuse to rip it out and put the air fryer in the space
Sort out a fuse box if lights go off did this just last week in a holiday cottage. In fact it was me who worked out which fuse was which and how to keep most of the electricity on by isolating the thing that was blowing all the electrics until the electrican came, while every one else was flapping around because their phones weren't charging
Turn off water at mains in case of leak yes