Architect and engineer drawings and submission fees should cost you about RM7,000.

Amount of time for approval entirely depends on whether your renovation has followed guidelines. Even so, approval would take 2-3 months at earliest following guidelines. Saw one house in ttdi which only got it's approval after 1.5 years from submission. It really depends on how complicated your plans are going to be.

Difficult to answer this question.
It depends on

Type of house
Which district
The applying agent
Range of construction
No standard price lah.