@Lorilyn B.
You have received a lot of great information on this thread We attend and buy at multiple auctions every month, fix, rent and then sell the properties to cash-flow investors who understand the issues with the redemption process that makes title insurance nearly impossible to get during the first two years. It can be a rewarding way to invest but it is a lot of work.
One thing I did not see mentioned is to make sure what tax years are covered by the foreclosure. It is not uncommon to buy a property at auction and then owe an additional 1-2 years of taxes that came due after the lawsuit was filed.
Also, remember that any money put into upgrading the property is fully at risk until the redemption period is complete. If the property is redeemed, they do not have to repay the money you spend on upgrade.
Still, Texas is a great place to buy tax deed properties. We just completed our 100th tax deed property and looking to do a lot more of them in 2015.