Couple of clarifications to start off:
Index funds and ETF's are essentially the same investments. ETF's allow you to trade during the day but also make you reinvest your dividends manually instead of doing it for you. Compare VTI and VTSAX, for example. Basically the same returns with very slight differences in how they are run. Because they are so similar it doesn't matter which you choose.
Either index funds and ETF's can be purchased through a regular taxable brokerage account or through an IRA or Roth IRA. The decision of what fund to use and whether to use a brokerage or IRA are separate.
Whole market index funds will get you exposure to US equity but consider also diversifying into international equity, bonds, real estate (REITS), and emerging markets. Any broker can give you advice on that score or you can get free advice from, for example, Future Advisor.
Now the advice:
For most people in your situation, you current tax rate is currently very low. This makes a Roth IRA a very reasonable idea. You can contribute $5,500 for 2015 if you do it before April 15 and you can contribute $5,500 for 2016. Repeat each year. You won't be able to get all your money into a Roth, but anything you can do now will save you money on taxes in the long run. You put after-tax money in a Roth IRA and then you don't pay taxes on it or the gains when you take it out. You can use Roth IRA funds for college, for a first home, or for retirement.
A traditional IRA is not recommended in your case. That would save you money on taxes this year, when presumably your taxes are already low.
Since you won't be able to put all your money in the IRA, you can put the rest in a regular taxable brokerage account (if you don't just want to put it in a savings account). You can buy the same types of things as you have in your IRA.
Note that if your stocks (in your regular brokerage account) go up over the course of a year and your income is low enough to be in the 10 or 15% tax bracket and you have held the stock for at least a year, you should sell before the end of the year to lock in your gains and pay taxes on them at the capital gains rate of 0%. This will prevent you from paying a higher rate on those gains later. Conversely, if you lose money in a year, don't sell. You can sell and lock in losses during years when your taxes are high (presumably, after college) to reduce your tax burden in those years (this is called "tax loss harvesting").
Sounds like crazy contortions but the name of the game is (legally) avoiding taxes. This is at least as important to your overall wealth as the decision of which funds to buy.
Ok now the financial advisor. It's up to you. You can make your own financial decisions and save the money but it requires you putting in the effort to be educated. For many of us, this education is fun. Also consider that if you use a regular broker, like Fidelity, you can call up and they have people who (for free) will give you advice very similar to what you will get from the advisor you referred to. High priced financial advisors make more sense when you have a lot of money and complicated finances. Based on your question, you don't strike me as having those. To me, 1% sounds like a lot to pay for a simple situation like yours.
