bike for o.a.p

john67music Posts: 2
edited October 2010 in Road beginners
recommendations please low cost new or used lightweight bike for o.a.p
i want mountain bike gears to get up hills straight handle bars to look where i'm going
& help my back is it 531 tubing? or modern light material,shimano or similar equipment
must have them mountain bike brakes which come wide open to get tyre out when i puncture away from home....thanks to any one who takes time to reply....john