Website SEO

Need a complex service site creation, its promotion and adjustment of contextual advertising.
The site on the subject of auto parts (very small segment). It is advisable to use some sort of template (I want to avoid the cost of a designer and reduce the cost of the project).
Website showcase (100-120 items) no sales - only representative function with EASY AND SIMPLE system of placing positions (2-3 photos) descriptions and prices.
And most importantly the web site promotion
Will give preference to the cheapest offer but a good portfolio and reviews.