1. Tools: good claw hammer, 3footcrow bar, 1 foot crowbar, nail punch, gloves and safety glasses. This is the bare min.
2. Other tools. Zawsall, circular saw.
If all you care about are the cross pieces then you can cut the edges and then you only have to worry about the middle nails. If you want the joists then you need to use a saw to cut as close as you can on the cross pieces. Just take your time and before you know you have some great free wood and a pretty good workout too.