As was mentioned, buy what you envision yourself playing. If you're an acoustic guy and that's where your heart is, buy acoustic. If you like electric bass and the sounds, buy that. Buying what you're more attracted to will encourage you to practice more and you'll be happier when you do. And it's not like learning to play electric bass limits you to just that....
As far as what to buy, there's no "correct" answer. If you have no equipment at all, there are some decent starter packs offered by companies like Squier, Dean, Washburn, and Peavey. While I am not a new musician, I am a relatively new bass player (converted from guitar). The first bass I played/learned on was a Peavey Zodiac-4. Nice, for the price. Now I'm playing a Schecter Raiden and I really like it, but it certainly wouldn't be for everyone. It wasn't big money, but it was the one that fit like a glove when I tried everything I could and the sound was what I wanted at the time.
My best recommendation is to look for a bass with a P/J pickup configuration and passive electronics. The P/J will usually give you the widest variety of sounds and seems to reproduce what most people expect a bass to sound like. Fender-styled P basses are also very popular because they have the most familiar sound of all of them. Passive electronics are easy to live with and simple. Try a bunch out at a music store. Guitar Center is a great library, and even though you WILL get more attention at a smaller store, GC usually has more to try out. Don't be afraid to ask questions of the salespeople, most are pretty cool and if you tell them that you're just starting out, they'll be more than happy to play/demo a bass for you.
In this case, there's no "right" answer, it depends on what you like. But buying a "starter pack" isn't necessarily a bad option, they're mass-produced for a reason. Like most people, if you play and really like it, you'll be upgrading equipment soon enough anyway.