turn off the air con if u feel under power. that's the only solution. haha.
small engine, u can't expect much from it.

the rim, just let it be. no point repairing it. maybe more scratch coming until u learn how to drive properly. know where yours 4 wheels are running, master it then only u repair or change rim. don't blame the pot holes. there are just too many around.

After removing the badge, go to body panel shop, they can help u with the hole. $$$ only.

K&N worth investing. it last a life time.hehe
1 filter from perodua already how much? K&N about RM 300.
Can oil it with ATF oil if u dont use ori K&N oil.

LCP, not really worth the $$. Just turn off the A/C, let the air con fan run, your up hill won't be that long isn't it? Unless u going genting. haha..
Genting, just wind down your windows will do. off air con..enjoy the cool breeze.