Right now, most pro publishers want a novel to be at least 80,000 words. They’ll take 70,000 in a pinch. In 12-point Courier (the standard for NY publishers), that’s over 300 words.
To calculate words, don’t use your “word count” feature – it’s wildly inaccuate (and will shortchange you). Also, you need to use a monospaced font for an accurate count. Then, follow this technique.
Your best bet on actually making money on this is to go to an established, royalty-paying publisher and have them pay you to publish it. You chances of success (meaning making enough money from your publishing to be able to afford, say, a new computer) here are admittedly small, but infinitely greater than anything else.
Second best bet (though much less likely to make you anything) is to self-publish. However, remember, it’s self-publishing. It’s your job to find a printer, put the books in bookstores, send out review copies, sell copies whenever you have the chance, etc. You are the one responsible for the most important part of a book publisher – marketing.
Worst choice is to pay someone to publish. This is known as a “vanity press” and you will get nothing from it. You don’t have any control over the marketing, and once you line up with a vanity press, no one is going to review your book. Electronic vanity presses are the absolute worst choice.
Your book must be in proper format, with no typoes or major grammatical errors.
The advance you get depends on many factors and can range from nothing to millions. It’s best to get some advance, however – that shows the publisher has an interest in marketing your work to get back their investment. A more reasonable advance expectation for a first novel would be $2500-$5000 (more for a hardcover).
Good luck.