got a list of these to look at in the next few days, all durashift versions so what am i looking for as i don't have a clue

i'm assuming they are all going to be the 1.5 turbo lumps, what sort of power are they pushing out?

if it's a 4 year old focus, are there any obvious things to look out for?

engine wise do they all suffer from that fuel pump lifter thing or is that just the fiestas?

what sort of bells and whistles should they have as they are all titanium or titty x models

anyone got one that can give me some pointers?

a few estates to look at too but they might be a bit too big for the mrs to drive coming from a mk6 fiesta

do they need dealer software upgrades for stuff then or can they be done diy?

planning to buy one for a keep as a daily for the next decade or so, so i want to cover all bases really and not start off with a shitter, there are plenty to look through but are there any major issues that i should simply walk away from or not even bother to go and visit?

thanks