I was in a very similar position a few years ago (the only difference was that it was burnout, not kids, that took me away from the bike). I let the LBS do a complete overhaul on my old bike - re-pack all the bearings, new chain, cables, tires, tubes and bar tape. After ten years (or more, in my case), the grease in all the moving parts is likely to be congealed.

I rode that bike for a season to make sure I really wanted to get back into it. Then I got a new bike the following season. (Actually DH got it for me for Christmas. It could happen to you. )