Hi there,
Straight into the meat:
1. My pages were indexed by google few days back. How long does google take to display the URL in SERP once the pages get indexed ?
A. Once the pages are in the index they become eligible to appear in the SERPs but, where they appear, on which page and in which position will they appear depends on lot of factors like the competition for the search term, your content, the back links that you have and the list goes on.
2. Does google give more preference to websites with more number of pages than those with lesser number of pages to display results in SERP (I have just 50 pages). Does the NUMBER of pages really matter ?
A. To a little extent and in some cases yes, but this again depends on the quality (in terms of relevance, uniqueness, originality etc, etc, ) of the content on a website, the quality of its link popularity and all the other 200+ factors that Google considers before positioning a website in the SERPs. To put it straight, you do not need to worry about the number of pages if your content is of pristine quality and highly relevant as per Google.
3. Does removal / change of URLs have any negative effect on ranking ? (Many of these URLs were not shown on the 1st page)
A. If the URLs being removed had duplicate content then in this case you will not have any negative effect.
Over a period of time, gradually, on an as and when required basis, keep adding pages that target one search term per page with relevant, unique and up-to-date content. This will result in a positive change in your organic traffic numbers. And very importantly, do not build links desperately from all the places. Earn links, that is what I would say, you have to earn links by giving a reason for your visitors to visit your website.
1. Try to earn links from authority sites in your niche. Links like this fall in the tier 1 category.
2. Get links from generic authority websites (like Wikipedia) by posting quality content. This would be your tier 2.
3. Get links from similar theme (sites that operate in your niche) websites. These links can be your tier 3.
4. Finally, earn links from generic web properties like forums, blogs, social networking sites, social bookmarking sites etc. These would be your tier 4 links.
A very important thing to keep in mind while doing the above is, "the quality of the content being posted". Be specific and try to address an issue or provide a solution in your posts. Never engage in low quality link exchanges and bulk link building. Above all, keep asking yourself all the time, "why should anyone visit my website?", "what can I do to make a visitor's visit to my website worthwhile" and " what should I do to make my website to give a better user experience or a better advantage than that of my competitors?"
With questions like the above, you will be able to secure a good longstanding and enduring position in the SERPs for your website.
Also be an active participant in social sites to attract good social buzz. Social signals are very good for your search engine optimization efforts and they can give a boost to your SEO efforts.
Wish you good luck.
Best regards,
Devanur Rafi.