None of it would worry me, however I can understand your concerns as a first time buyer.
Firstly, as the PP has says, I am presuming this is an older property. Understand, all houses will come with ongoing maintenance, so make sure you are aware of it and make financial provisions.
Secondly, surveyors will always cover their backsides which is why surveys are full of, you should get further tests, this may happen, possibly etc etc.
FInally, understand that things like electrics may be perfectly safe but will not meet the current regulations, that is very normal.
So what to do, before purchase on the results of the survey - ask an electrician to do a electric check probable cost about £100 - this will tell you the electrics are fine.
Get a structural engineer to have a look at the roof purlins in the loft - cost ish, depending on where you are in the country about £500.
Have a roofer look at the chimney and the lead flashings.
The last thing I will say, if it is an older age, remember they need to breathe to ensure there is no damp. Never get damp companies to have a look at a house, they will tell you the world is going to end in order to sell you expensive damp treatments which do more harm than good.
Good luck and enjoy your first home, both a daunting and exciting time in equal measure.