Both can be a DIY job is you're that way inclined. I'd take a photo of the locks into your local locksmith and get a quote on replacement barrels. They'll be able to order them do they are all keyed alike. While you're there, ask them about the runners.

Who ever is quoting on your windows, get them to run quotes on glass of various thicknesses. We ended up with 11mm glass in our stackers because the price difference between the thinner glass was negligible....we were really surprised.

Ruth, Supply cost will vary greatly depending the following factors: - Window/Door sizes, if not standard then costs may increase dramatically. - Type of double glazed unit, thickness of the glass, if it has any coating, gas infilled. - Type of windows/doors such as casement/sliding and so on. - Thickness of the aluminium. - Hardware (hinges, runners, handles & locks). - If the site has a wind rating requirement as part of the building code. - If you are in a rural area then this could have a bearing on cost. - The scale of your project; the larger the supply the lower the sqm cost. - The supplier. I don't know much about uPVC, but would expect this to be cheaper than a thermally broken aluminium window. The price for a particular unit may vary considerably, whereby a small 1200 x 500 mm window will be more per sqm than a 3200 x 2400 sliding door. So difficult to provide anything other than a very rough estimate. Suggest you budget at $350/sqm for supply only. If you have not done so already, then take a look at the Australian Window Association website and presuming your desire for a thermally efficient house, review products under the 'WERS' (Window Energy Rating Scheme) section. Recommended that you use a supplier that has had their product WERS accredited. Hope the above get you started. Good luck.

Pics of window and sliding door pre renovation - looking at white cabinetry, grey beige stone benchtops and white grey paint colour. New dining table will be wood with black leather chairs and black breakfast bar stools. Hope this gives a clearer picture.