1.) Canon or Nikon, it really doesn't matter which one.
2.)With that type of photography, there isn't that much high demanding so any of the entry levels or mids of Nikon or Canon will work.
3.) Check answer to #2
4.) You are generally right for the lenses for different scenarios or types of photography, but you don't have to worry about lens not fitting the camera, because your not buying FF so it's not a problem.
I'm always a big proponent of buying the lowest I can deal with and spend the money on the lenses. For Nikon, the lowest I'd go is the D3100 and for Canon the lowest would be the XS.
I am really unaware of what to look for in dSLR cameras.i ahve een reading but dont understandand really the specifications that well.maybe when i have one i will know.i want to buy one.At present i have a sony T77 which is a point and click and i carry that everywhere i go.
1)I would like to know which (company's)dslr camera to go for ?-NIKON or CANON.and why ?
2)i like to click potrait ,landscape or during travelling,at night/low light and my growing 2 year old.
3)i am looking for something which would not be too high end.But where i can start off with(things get outdated every other day.)
4) i have read that for each type of photograpgy the specific kinds of lens will give better results.However i want o know if any kind of lens will fit one particular type of camera body ?