It doesn't all need doing the day you move in!
ALL houses need something doing to them - yes even the 'perfect' looking newbuilds, they're put up fast and as things settle, cracks appear, problems surface...
It is also normal that when you start doing a job.. more jobs will be revealed - the only ways to avoid this are - don't start any jobs - don't own a house at all.
Going from tenant to owner IS a big deal, its overwhelming, there isn't someone to call when things go tits up/fall down/fall over/fall off... but it's ok, you'll cope!
All the jobs you list can be done by anyone... the plastering, if you want a GOOD job doing, pay someone (its an art.. not just a skill!).
Beyond cleaning and putting down flooring, none of them need doing immediately and, most of them are pretty easy!
Keep your eye on the future... how it will look when its done and the freedom you have now, to have it look exactly as you want!