I can certainly jump start a car but you have to be so carefull these days, too many computers involved. I've brought one of those jump pack things to do it next time I need to which is fairly often with two young drivers in the house.
Also a wheel change is no problem unless the wheel hasn't been off for a time and you undo the bolts and the thing is pretty still welded to the car and you have to lie on your back and kick seven bells out of it or hit it with the spare or bolt it back on losely and roll forward a bit.. but other than that its easy
I'm a pretty pratical person and can turn my hand to most things, even more so these days when there are a dozen vidoes explaining exactly what to do, used one of those to do a head gasket on a peugeot!