". . . let's say i am the winning bidder on Sale day and buy Real Estate that had 5 liens, i will get the title lien free and clear . . ."
If it works in Texas the way it works here in Vermont . . . . then the answer is YES. Your local Delinquent Tax Collector or the County Treasurer probably has a write-up on how exactly the process works in your area (a write up because the question gets asked so often).
However, there's usually a waiting period (the Redemption Period) before the actual conveyance occurs (here, it's a Year + One Day) during which time the Owner of Record OR any of the Lien Holders may appear to pay off all of the delinquent taxes and the costs of the sale (including the costs of notifying all of the known Lien Holders of the impending Tax Sale by registered mail).
Usually, what happens is that the 1st Mortgage Holder will come in a day or so before the end of the Redemption Period, pay off the accumulated outstanding taxes et cetera, and simply add that amount to the mortgage of the Owner.
When that occurs, you'll get refunded your purchase amount PLUS Interest . . . . here that Interest Rate is 1% Per Month or any part of a month (12% per annum) so it's worth while doing if you have idle cash sitting around.
Only twice, in attending Tax Sales for about 10 years, did I actually wind up owning a piece of property by this method; and I've researched hundreds of properties that have come up for Tax Sale, just so I wouldn't become the owner of some kind of booby prize.
Having a Tax Sale is a good method for communities to get Tax Payers to bring their taxes up-to-date; but don't get your heart set on gaining ownership of some neat little farm for next to nothing . . . . there's a catch (usually). More has been written regarding Tax Sales here on this Forum, if you do a search using "Tax Sale" (with quotes).