1) I hate add maths, I love Arts, should I replace add. maths with Arts?
Don't drop, but take it with Arts as well.
2) What job can I take up in Arts(as in drawing)?
I'm not sure. Maybe Mass Comm? Digital Arts? Publishing, such as cover, diagrams, inserts, and such. Production like theater, movies and dramas. Game development, but you will need basic in IT and programming/coding.
3) What do I lose if I drop add. maths, aside from engineering/physics/math courses?
I'm not sure.
4) What job can I do in the field of biology? Only lab work?
In the field of biology, there is an increasing integration with digital processing. Labwork needs you to be efficient with digital equipment as well. Depending on the sub section of the biology field (minus observation field), you will need to interact with digital equipment, be it the analysis machine, the post analysis in PC, or heavy computation in genetic fields.
5) Should I further my studies in Arts(as in drawing)?
In just Arts, I would say no. If Arts and IT/coding/programming, that is better.