Not having an MVP doesn't bother me (or most people I can think of) as long as funding and a plan are in place (not based on lots of future promises). For example, I would never join a startup who has $50k in cash and promises for future money if X and Y are done. The reason is simple, I've seen the X and Y goals get moved on founders too often then everyone is screwed. Of course, it is different for founders/co-founders as it isn't rare to take $50k to prove something out then raise more money, but that isn't something most non-founders can accept as reasonable risk.
To be a bit more specific assuming you have actual cash in bank. Primarily the most important thing would be transparency about how much money there is, what the runway looks like and what's the plan to raise more. Transparency here would also have to inspire me that there is enough demand/support that the next round is possible and the product actually has some early traction even as just mockups.
Beyond transparency in all the aspects. Probably in order for me, I'd have to see a reasonably solid product idea, market and basic plan on how you plan to get from now to the next level and then the guesses how it goes from there on. I think most people in startups know anything beyond the first few months this early would be hard to predict, but knowing you have a plan is important. Along with this, understanding your experience and skills would be important.
After that it would boil down to a fair and real stock option offer on the table, not a 0.5% type situation, and some reasonable compensation.
I view finding people for early hires as not much different than wooing an investor, you need to convince those first few people you have a plan and can execute on it (with help of course) to get things moving forward.
Given where you are too, another option is forgo any employee hiring immediately and hire a consultant to create the MVP which can help you gain a little more traction and then start looking for employees as you get more funding.
