Thank you for giving me the opportunity to get in front of you via Trulia. First and foremost, there is no limit to the amount of photos that you are able to put on the website. With that said, websites like Trulia, Zillow, Realtor.com, Yahoo, Google, Tribune, etc. are direcly synched up to the MLS so you are not able to submit your own home's listing - unless you're a Realtor.
Please do not take this as a personal attack as I really hope to educate you on how the home sale process works. Because we have never met I'm not positive if your question is because you are planning to do 'For Sale by Owner' but if this is the reason, I have to say you have already tripped and fallen at the start of the race. By not having a Realtor you are not able to advertise on the MLS which is the only way thousands of Realtors and their clients search for properties. Because your home will not be on the MLS there is no way your home will show up on these major websites - did you know over 90% of all buyers start their search online? Another reason is that a GOOD Realtor is able to provide you and prospective Buyers factual data on what is selling in your neighborhood, on your street and even in your building. There are some webites that offer an "estimate" but it's just that - an uneducated estimate that does not factor in finishes, square footage, condition, and many other qualities of your home. There are so many more reasons but I'm already rambling on and can explain more in depth should you like to meet.
As another Realtor said on here, think for a second about the real cost of selling your home. By using a Realtor, sure you will have to pay a commission but there are a ton of statistics that will show you that selling your home with a Realtor will not only sell your home much faster but it will also sell for a higher price than if you marketed your home 'For Sale by Owner.' A commission may seem to have a sticker shock but please look at the big picture and know that there is a reason why we have Realtors.
Take care and best of luck - please know that I'm here to help and offer advice when you are ready.
3101 N. Greenview Avenue, Chicago, IL 60657