As Dogboy has said, you should never lead with your inexperience, it makes for a weird and or desperate first impression.
I never dated anyone throughout high school and yet when I started dating in my first year of Uni, I never felt that my nonexistent dating experience mattered. If the girl I was dating or going steady with decided to tell me about her prior relationships, I would do the same and would inform her of the fact that I hadn't really dated anyone before. Usually this stuff comes up weeks if not months into a relationship anyway, so it's nothing to worry about right off the bat.
With regards to sex, I was a virgin until I was 21, and I have only had sex a handful of times, it's always a different experience and completely dependent on your partner and once again, it isn't something that is traditionally brought up on the first date. If she brings up her past sexual escapades/experiences, then you can chime in and let her know that it's something you've never participated in. My girlfriends have never been anything but understanding regarding my relative disinterest in sex, a lot of women don't want sex all the time, many just want a nice romantic connection with someone, something that's deeper than just physical gratification. As long as you are honest when this is brought up, your partner will understand.
I think these questions will likely come up if you date her for a while and if they come up, simply answer them truthfully, she'll most definitely understand. Until that time comes, just enjoy getting to know this person and enjoy dating for the first time, don't sweat the small stuff and really, these questions are in fact quite small in the grand scheme of what it is to properly court and get to know someone