Vagabond:

Try looking on Craig's List to see if anyone is selling a bicycle you could pick up inexpensively. See if anyone has a "Townie" -- I think you would enjoy that type of bike.

Also, go to a local bicycle shop. Many shops have used bicycles for sale and can help pick the right make/model for you.

For someone not going to do a lot of riding, initially, try a Hybrid.

Good Luck