Welcome to the first few weeks of Porsche ownership. In fact, I'd say welcome to the first few weeks of ownership in a 20 year old car...it doesn't matter the make.
I speak from experience. Currently my stable consists of a '59 International truck, a '60 international truck, two different '68 911s, a '77 911, a 1984 928, a '97 Boxster, a '01 Boxster, a '05 911 and a 08 Cayenne. Everyone of those suffered from some form of deferred maintenance when I got them (except the 05 and 08 which I got new).
Case in point, I picked up the '01 Boxster just a couple of months back. It's got 80K miles on it. So far I've put new brakes, new rear calipers, new air filters, new plugs, new brake fluid, new struts, inner CV joints, motor mount, and....hmm...I think there are a couple of other things that I've forgotten. Oh yea...the rear window is cracked and the top needs replacing. Sigh. As these cars age, people buy them but can't afford to maintain them. So, it just doesn't get done. It's more common than you'd think. So, I go into these cars knowing I'll spend the next 6 months fixing stuff that I didn't break. However, once I do a thorough job fixing the deferred maintenance, the cars are then pretty reliable. They're still 20 years old (or 30 or 40 or even 50 years old in my case) and so stuff still fails. But not nearly at the rate you see during the first few days of ownership.
Just look at repairing your Boxster as a hobby. You didn't buy the car to drive it -- you bought it to fix. You're just driving it to see what is going to fail next.
Sure, I do jest a little bit with that comment, but if you know things are going to fail and that you're prepared to make repairs -- it makes it a lot easier to just shrug your shoulders as you put it back up on jacks.
Good luck.
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