I'm not trying to be Dr. Phil or anything, but I agree with JH - you have to figure out if this car is for you.
I had looked at getting my sc3 for a while before I decided to buy it - fully knowing that although Lexus is top quality, it's also damn expensive to fix even if you DIY. Because I'm from Canada and they're a lot rarer up here than in the US, I paid a bit more than what most people south of the border pay for theirs (I'd JUMP at the chance to pay less than $4000 for a newer sc3. I paid just over $11,000 US for my '91...that's right, a '91). But I love the look, the performance, and the potential. And to me, fixing up issues is totally worth it as it's the car I've wanted for a couple years now.
Honestly though, what do you expect to get paying $3200 for luxury a car that, brand new in the early 90's was tens of thousands more brand new? And by the sounds of it, a good portion of your issues are cosmetic. I'd say just deal with it if you really like the car. If these issues really upset you that much then make it a priority or sell the car to someone else who can truly appreciate it, especially if it is your second car. But I'd say you'll certainly not regret spending the time and money to fix your ride up. It's more than worth it.