How much should I ask for in equity/salary?

By Round A do you mean "the first round?" I assume there is no money, and founder is working free?

I'm not sure this deal will work out.. Investors want to know where their money going and % promises like the one you've described may make them run for the hills.

Either way that's not a good deal structure. In that case you could bail with a fat check for a few weeks/months or free work.

Please detail further.