Silly question but what are you jump starting it with? have you got a good enough connection, if you have no joy why not take the battery out and charge it overnight(assuming you have a charger)
Is it a manual or automatic? if I am not wrong all IS300's in the UK were automatic,so a cluster from a IS300 automatic would therefore not be a plug and play in a IS200 manual apart from anything else 🤔
Choice is yours( without being bombarded with the pros and cons lol 😆),both are okay,I have always used momentum 99 in my lS 200 sport and 250 f sport out of Choice I might say 😉
Its a rear wheel drive car for starters,secondly a decent set of tyres would help in reducing this,have owned 2 IS200 sport before moving on to my current IS250 f sport
Time for a change,halfrauds sell main stream batteries as well as their own brand,the choice is yours depending on how much you want to spend,yuasa,varta,bosch are good brands
Rightly or Wrongly for me Halfords for certain things like polishes, shampoos etc for servicing nah,I leave that with my trusted local independent garage 😀👍