Originally Posted by
bikemig
+ 1 on all this.
To the OP: it will be expensive to have a shop overhaul your bike. This is a pretty straightforward job and you can do it on your own as well as replace the tires. You'll need these skills on your ride and it will save you a lot of dough.
Yes, clean/lube/adjust for everything is a good idea. One could also do the easier bits & have a shop do the crank etc. Sometimes old bike parts are stuck on pretty good.