1. I’m afraid not yet. It will be added in a future release after the front-end options are reworked. It will take some time.
2. I don’t think they work together. Usually combining 2 filters result in either one or the other results to apply. They will probably work without conflict, but the results from Ajax Search Pro filter will not be applied to the other filter and vice versa – they work independently.
Without custom coding I don’t think it’s possible. Filter plugins/solutions work independently, unless they are specifically coded in a way to affect each other – which I have never seen before in any plugin, so I don’t know if it’s worth trying without customization.
If you need professional help, I recommend wpkraken, they did custom jobs for our plugin before, they might know a solution for a fair price.