Here is a question regarding TITLE SEARCHES and TITLE INSURANCE

I've been checking out alot of auctions on www.auctions.com

I am wondering, is it safe / smart to do a title search with an online website for 40-60 dollars, versus using a local title company ?

1) Will all the searches show tax liens, mortgage info, etc?
2) what about title insurance ? how is that handled ? how much should it be ?
3) What exactly is the difference between a title search and title insurance ?

4) Can you recommend a title website that you have personally used ?