help in making complete set of 4 X 5 camera

[John Kasaian]

Using The View Camera is a good basic book. For landscape I'd suggest a lens between 120mm to 210mm depending on your subject. Wider lens for up close, intimate landscapes and a longer lens for the 'grand view' though that is certainly a personal choice. The important thing is that it covers 4x5 with plenty of room for movements.
For a camera you'll want to hike with, a wood clamshell type folding camera is generally more popular than other types.
If at all possible take a class and use the school's cameras in order to get an idea how these things work.

[John Berry]

If only one lens, make it a 210. If you limit yourself to one lens for at least a year. It will payoff forever in your learned ability to SEE.

[rugenius]

I'll agree with the 210 mm.
I'm new to LF and in the short time spent experimenting the Schneider Symmar S MC was wonderful to use and a great purchase ($250 in EX+ condition).
The Chamonix 4x5 is also very compact/ field ready IMHO.
I'm enjoying it using a 6x12 roll film back.
Just gotta remember to shut the shutter before placing the film holder onto the rear standard!!