The basics.....
To drop into the sun you need to kill most of Earth's orbital velocity...
2Pi*1.50*10^8 km /Pi*10^7 sec (1 year)
that leaves.....
~ 30 km/sec
do the same thing for the moon except this time gain it.... (not as good of an estimate here but good enough)
5*2Pi* 3.85 * 10^5 km / (6Pi*10^6 sec)
......
10^7 km / 2*10^7 sec
.5 km/sec