The steps you will need to use is just like any other house; clean, repair, prime, caulk then paint.
First you need to clean up all of the painted surfaces. It looks like the body is stucco, soffits and fascias are plywood and solid wood, and the porch wall is concrete block. The body and porch wall will require some scrubbing with a good soap, TSP (trisodium phosphate) works really well, and maybe some bleach. Bleach will help kill and remove mold. Use a pressure washer, 1500-2000 psi. A scrub brush or stiff broom can help with stubborn areas. It is very important to start with a very clean surface.
Check out the entire house for rotted or danged areas and repair as needed. Pay special attention to the windows and door frames. Excessive cracks in the body substrate can also be repaired now. Once your house is really clean you can see all of its defects. Also remove all loose paint at this time.
Once it is clean and repaired you can prime. I would use an acrylic primer on the masonry surfaces. Priming the trim and windows depends on their condition and the original paint plus the type of new paint you will use. Its not a bad idea to prime these areas as well, even if they don't really need it. A good acrylic primer can be used on the trim. If the original paint is oil based use an oil based primer.
Seal it up!!! Use a very good caulking to seal the gaps and cracks. Don't try to save money here. I like Dap's Dynaflex 230. It costs more but is worth it. DO NOT USE 100% SILICONE! Only use a high quality paintable caulking. Anyplace that water can get in needs to be sealed. Your biggest enemy is water behind the paint film.
Now that all of drudgery is finally over you can start to paint. Personally, I would use an elastomeric on the body of your house and an acrylic on the rest. Your choices depends on what is locally available. Paint the soffits and fascias first then the body and finally finish with the details.
Check out <a href="http://www.house-painting-info.com/exterior-paint-preparation.html">Exterior Preparation</a> and <a href="http://www.house-painting-info.com/exterior-painting.html">Exterior Painting</a> for more details.