Lake Kawaguchi to mt fuji 5th station

Hi,
Can I check how do I get from Lake Kawaguchi to mt fuji 5th station? Issit possible to cover noth hakone and Lake Kawaguchi in 1.5 day? Will be reaching at hakone yumoto at 4pm and plaaning to leave for tokyo next day 6pm. are their any operating hours for the bues and sightseeing places in hakone? What places can we visit from 4pm to night time?
Any cheap and good onsen to rec in hakone area?Intending to stay in hakone lake hotel..but can't seems to find any review on this hotel..
Finally, wat's the temp in hakone/mt fuji area be ard mid sept? Is a normal windbreaker sufficient?

Thks so much

I will list resources for you :
Hakone
http://www.japan-guide.com/e/e5200.html
Kawaguchiko
http://www.japan-guide.com/e/e2172.html
Japan guesthouses (for ryokan)
http://japaneseguesthouses.com/db/hakone/index.htm
...and more for Hakone
Hakone Navi
http://www.hakonenavi.jp/

Can I check how do I get from Lake Kawaguchi to mt fuji 5th station?

There are buses through October. On weekends only in November. No buses during winter.

Issit possible to cover noth hakone and Lake Kawaguchi in 1.5 day?

Yes, it can be done if you hurry.

Will be reaching at hakone yumoto at 4pm

Depending on the month of the year, it can be dark already by 4pm. Don't expect to be able to do a lot in Hakone after 4pm, especially during the winter months.

are their any operating hours for the bues and sightseeing places in hakone?

Buses typically operate until around 9pm. Sightseeing places typically close around 4-5pm.

What places can we visit from 4pm to night time?

I would be checking into your ryokan/hotel and enjoy the hot spring bath and dinner.

Finally, wat's the temp in hakone/mt fuji area be ard mid sept?

For Kawaguchiko:
Average daytime high: 23 degrees
Average nighttime low: 14 degrees