A few thoughts:
I second looking for a co-op preschool in your area. They are dramatically cheaper. You have the chance to see your child interact with his peers. You get to know the teacher, other kids, other parents, etc.
When your child gets older, he may well experience problems at school (especially until he's old enough for the gifted program). Where I live (Montgomery County), the focus is on reducing the gap. While bringing up the achievement of struggling students is a valuable goal, there's not as much interest in challenging advanced students. A lot of your experience will most likely be teacher dependent. A good resource to use is Hoagies website. It explores all gifted issues, including approaching gifted issues at school, and many resources (links, books, etc.) to use at home.
http://www.hoagiesgifted.org
At this stage, I think the best thing you can do is just expose the kid to a lot of different experiences. The world is so new to them that pretty much everything (measuring floor samples) is a learning experience. Playing games together teaches them a lot.
Every place you take them, every thing you do with them builds synapses. I think with gifted children, the best thing you can do is to open the world to them and then let them pull you where they want to go (no pushing necessary, although you will almost certainly be accused of being a pushy Mom). He may decide to pursue anything (math, dinosaurs, sports, trains, art, etc.) His passions will likely change as he discovers new things to explore. You just want to feed the sponge and to have him enjoy what he's doing.
Incidentally, I don't have a problem with TV. We tended to have it on in the background a lot. I would frequently watch it with them and we would discuss the shows together.
Toddlers have lots of time in their schedule.