Is the IDEALHOUSE 8 in saw strong enough for hardwood?

It will cut thin hardwood, but the 6.7 amp motor bogs down on thick stock and long rips. For repeated hardwood work, a 15 amp 10 in jobsite saw is the better tool.

What can I cut with an 8 in blade?

Expect roughly 2 1/2 in of cut depth at 90 degrees, less at bevel. That covers trim, shelving, plywood and 2x material on edge, not thick posts.

Does it need a dedicated circuit?

It runs on standard AC mains and draws modest current for its class. A normal household outlet is fine, though a long thin extension cord will sap power.

Can I use a 10 in blade on it?

No. The saw is built for 8 in blades, and a larger blade will not fit the guard or arbor safely. Stick with 8 in blades of the correct arbor size.

Is it a good first table saw?

Yes for light DIY use where space and simplicity matter. If you plan furniture or repeated rips, a larger saw with a better fence will save frustration.