Sounds to me like you're going to spend some $$ in order to get the car tip-top. Just how tip-top do you want it and what will go wrong or be noticed next week that doesn't fall into the elective category?
Any near 15 yr. old car irregardless of make; maint. history is going to need work.
You could spend $1000, $2000, $3000.......who knows?
In my opinion, this car is far from mint condition.