The usual way of doing two-languages in one document is by a two-column table
(with or without borders) so long as you have multiple rows (ie not one row
extending the whole document). This also has the benefit that new
subjects/paragraphs can start aligned together.

For multiple TOCs.
There is a previous posting
http://www.microsoft.com/office/community/en-us/default.mspx?dg=microsoft.public
.word.docmanagement&mid=64fff2b1-942f-46ef-bdf2-ef5166ed8814&sloc=en-us

Personally I have used the biult-in Heading styles and made copies of the
styles I want to use, slightly change the StyleNames and modify the TOCs in
the styles listing to only include the Headings for each language.

For multiple indexes in one document, see the previous posting
http://www.microsoft.com/office/community/en-us/default.mspx?dg=microsoft.public
.word.docmanagement&mid=cdbb32a1-2bde-41df-bb41-6bdd9d4966da&sloc=en-us

Again I would think that copies of the Index styles could work here as well.
Hope this helps
DeanH