SEO - Top positions with major search engines

Newly formed online store and need to have the site achieve top ranking search engine positions with major search engines used in the US such as Google, Yahoo, MSN, etc. Optimization of site, submission, and one way relevant links to achieve the best search positions based on the best keywords for the type of business. Not sure how many keywords but I would assume from 20 keywords or more. Website is [login to view URL] Bottom line is that this site is brand new and I need to have it achieve high search engine posting results. Whould like to know your best bid for the project, estimate of time, and what you will be able to achieve based on stated needs and experience. Thanks.