The 2 most important things that a potential buyer, when buying at auction, must do is firstly engage your solicitor (which you have already done) so that they can inspect Title Deeds etc to look out for planning / title issues and advise you if they forsee any difficulty with same.
Secondly you will have to talk to your Bank to get Approval in Principle to see if you will be in a position to fund the purchase.
Remember that when you go to auction that you will usually be asked to sign contracts and pay a 10% non-refundable deposit and you will be given a time frame to close.
Good Luck,
P.