What kind of learning tools (toys or books etc) for my 13 month old daughter? I want her to pick up words and understand colours, since she loves Lego toys.

In my experience, kids learn colors by regular iteration from others. For example, you could show her the leaves of a tree and mention that it's green. Do that again with some other green object and again and again. Then some more. Then ask her what color is another green object. I used this methodology when my kid was 1yo -- don't remember the innumerable times I did this with different colors. One day we were playing a new game -- inserting different-colored straws in a bottle with a hole in the lid. I asked her to insert a yellow straw, she did that. Then, a green one, she did that. Then a blue, and a red and so on. That was an eye opener for me that 'Hey, she has learnt it!!' Even now when my kid is 2yo, I make it a point to brush up her knowledge of colors.