You could have got sage advise from this forum also.
I have this router installed in a router table for several years. May date back to 2005. I have replaced a bearing at the end of the rotor, which I consider was a lifetime lubricated bearing whose life was shorter than the life of the router.
Purchase the bits you need, but first decide what the need will be based on your projects.
Another post earlier in the week in the General Woodworking was a person who purchased a router and now wanted to know what he could build with the router.
For my purposes a router is not the main tool of construction, rather a tool to perform some final operations. Typically edge treatment.
The Bosch has 1/2in and 1/4in collet. I recommend 1/2in bits where possible. They will be more robust and so have less vibration.
I have not yet broken a 1/2in bit, but I have broken a 1/4in bit. Technically 1/4in dia, but 1/8in cutting diameter. Likely my trying to take off too much or too deep.
The router bits which I use the most are :
a) Roundover. 1/8in, 1/4in, 3/8in, 1/2in cutter radius. These are examples of the ones with bearings. The bearing rides against the wood and so can be used without a straight edge guide for the router. It does require the wood to be straight.
b) Straight bit. My 1/8in bit is used with a guide to make bowties and the hole to install the bowtie.
c) I have some spiral upcut bits 3/8in and 1/2in which I used to make grooves or mortices.
d) I have slot cutters of various sizes. Good to cut short tenons or slots for joining boards together.
e) If I want a gentle curve to a cutting board but not a roundover, I will use a Queen Anne bit, like this one. I think this was named after some style of furniture.
f) I also have some Ogee style bits which I used when I want an ogee style of edge on a board.
There are many sites from which to purchase the router bits.
Infinity Tools have decent router bits.
Eagle America has a lot of selections.
The Eagle America brand is meant to be US made.
The Price Cutter brand are foreign made.
MLCS has a good selection of bits. I think most foreign made.
Peachtree also has a lot of router bits.