Peugot 307 Rapier 52 plate..Wont start..has to be pushed

No real probs with my car till now..car started went about 1000yds [to cashpoint] jumped out..got back in 30 seconds later..dead as a dodo!!!.radio lights all elecs were ok..but nothing just clicking on turning ign key?had to be bump started..went to supermarket all ok..parked at home.next day the same just clicking..Please any ideas..neighbours friends etc fed up with pushing me..helpless blonde routine wearing thin!!! HELP and cost to repair would be sooo helpful.xDawn